Why Some Clues Feel Obvious Only After You Know the Answer
You reveal the word, you read the clue again, and it seems almost rude that you missed it. The sentence looks like it was pointing at that word the whole time. It was not quite doing that. It was holding a few meanings open, and the word you now know walked in and shut the others. Hindsight is doing the editing.
The sentence was still loose
Before you know the answer, "you use this in the kitchen" can be a spoon, a pan, a towel, or the sink itself if you are in a generous mood. After you know it is spoon, the same sentence seems to describe a spoon and nothing else. You have stopped hearing the other nouns. That is not the clue getting clearer on the page. It is your reading getting narrower.
Good clues try to arrive already narrow. They mention a use that rivals do not share. Even then, a reader who is hunting a trick will widen them again. "A small metal piece that opens a lock" is a key. Someone hunting a trick starts thinking about a riddle, and the plain noun sits there unused. After the reveal, the plain noun looks like the only thing the sentence could have meant.
You remember the path that worked
Solving is messy. You try two words, reject one for length, squint at a fixed letter, and then land. Memory keeps the landing and drops the mess. Later the path feels short, so the clue feels like it should have been instant. It was instant only at the end, after the wrong turns were thrown away.
This is also why someone else's solve looks smug. They tell you the word and the clue in one breath, and the pair sounds inevitable. They are not showing you the minute they spent on the cousin word. If you want a fair look at a clue, cover the answer and read the sentence cold. Most "obvious" clues stop being obvious under that test.
One word claims the grammar
Some clues turn on a verb that several nouns can take. You dry with a towel. You also dry with air, if you are being annoying about it. The intended noun claims the verb and makes the other claims sound silly. They were not silly before the noun arrived. They were just less likely, and "less likely" is hard to feel until "likely" has a face.
Patterns help here in a way the memory forgets. The pattern may have killed the clever reading before the clue did. Once the word is known, you credit the sentence. Often the sentence was only half of it, and the length was the half that actually decided.
What to do with the feeling
The aftertaste is useful if you use it to see which meaning you ignored, and useless if you use it to scold yourself. Look at the rival you preferred. Ask what in the clue you had to overlook to keep that rival alive. Usually it is one concrete noun or one fixed letter. That is a small, repeatable miss. It is not a sign that the puzzle was unfair, and it is not a sign that you cannot read.
If the reveal sentence still feels like it could fit your wrong word, the clue may actually be loose. These puzzles aim at one intended answer, and a note about a real double is worth sending. A feeling of "oh, obviously" is not, by itself, that note. That feeling shows up even when the clue was fine and the miss was ordinary.
Read the clue once before you look at the pattern, and once after. The second reading is the one that should feel narrower, because the shape has already thrown words out. If it feels narrower only after the reveal, you probably never let the pattern vote. Next time, let it vote before you decide the sentence was being coy.
Related: How Letter Patterns Help You Guess a Word and Why Word Games Reward Elimination More Than Guessing.