Chatted about headgear (3)
I believe the answer is:
hat
'headgear' is the definition.
(I know that hat is a type of headgear)
'chatted about' is the wordplay.
'about' says the answer is hidden in the clue (the clue goes around or about the answer).
'HAT' is hidden in the letters of 'chatted'.
(Other definitions for hat that I've seen before include "Cap" , "Bowler maybe" , "Headwear" , "Eg, derby" , "Item of headgear" .)