Criticise a close relative's headgear (6)
I believe the answer is:
panama
'headgear' is the definition.
(panama is a kind of headgear)
'criticise a close relative's' is the wordplay.
'criticise' becomes 'pan' (informal term meaning to criticise heavily).
'close relative' becomes 'ma' (ma is a kind of relative. I am not sure about the 'close' bit.).
'pan'+'a'+'ma'='PANAMA'
Can you help me to learn more?
(Other definitions for panama that I've seen before include "Hat woven from jipijapa leaves" , "American canal or kind of hat" , "Great American canal or tropical hat" , "Hat; Central Am. canal" , "Wide-brimmed hat" .)