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