Artsy cap (5)
I believe the answer is:
beret
'artsy cap' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for beret that I've seen before include "item of headwear" , "Flattish round hat" , "Round, brimless cap" , "Flat French cap" , "French-style cap" .)