Sikh headgear (6)
I believe the answer is:
turban
'sikh headgear' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for turban that I've seen before include "Piece of cloth worn around the head" , "Eastern head-dress" , "Capital wear" , "Cloth worn as headdress by Sikh" , "Sikh headdress of scarf wound around head" .)