Bear to destroy head wear (6)
I believe the answer is:
boater
'head wear' is the definition.
'boater' can be an answer for 'wear' (boater is a kind of wear). I'm not sure about the 'head' bit.
'bear to destroy' is the wordplay.
'destroy' indicates anagramming the letters (I've seen 'destroyed' mean this).
'bear'+'to'='bearto'
'bearto' is an anagram of 'BOATER'.
Can you help me to learn more?
(Other definitions for boater that I've seen before include "Hat; eg, rower" , "Hat style" , "Sailor's straw hat" , "Stiff hat made of straw" , "Flat-topped straw hat" .)