Talks about headwear (5)
I believe the answer is:
chats
'talks' is the definition.
(I've seen this before)
'about headwear' is the wordplay.
'about' becomes 'c' (abbreviation for circa).
'headwear' becomes 'hats' (I've seen this before).
'c'+'hats'='CHATS'
(Other definitions for chats that I've seen before include "Engages in casual conversation" , "Talks - birds" , "Wrens" .)