Headwear usually worn metaphorically

THINKINGCAP

This imaginary hat is often "put on" when someone needs to concentrate or solve a tricky problem. You might hear it mentioned in fairy tales or creative brainstorming sessions.

This clue plays on the phrase "thinking cap," which isn’t actual headwear but a metaphor for concentrating hard. The word "usually" hints that it’s not a literal hat, steering you toward the figurative meaning. "Headwear" directly points to "cap," while "metaphorically" clues you into the full idiom—put them together, and you get THINKINGCAP.