Metaphorical headwear for brainstorming (8,3)
I believe the answer is:
thinking cap
(Other definitions for thinking cap that I've seen before include "What should help one meditate" , "state of concentration" , "Supposed aid to cogitation" .)
I've seen this clue in the USA Today.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free.
Check out my app
or
learn more
about the Crossword Genius project.