Headdresses (4)
I believe the answer is:
hats
'headdresses' is the definition.
(hat is a kind of headdress)
This is all the clue.
(Other definitions for hats that I've seen before include "Headdresses" , "Headwear" , ""Porkpie" and "pillbox" attire" , "Headgear" , "Milliner's stock" .)