To me a "stop watch" is a type of watch, that's straight forward. But there are other clues that rely on cultural references I'm not familiar with - and that is, I think, inevitable in this type of game. We all have different backgrounds and there's no universal shared understanding that would make every clue the same difficulty for everyone.

I saw someone on here recently say they like to do the puzzle without looking at the clues, and I've started doing that on and off too, it changes the game in an interesting way.