Protective headgear (6)
'protective headgear' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for helmet that I've seen before include "to provide capital protection" , "Biker's headgear" , "Safety hat" , "Tin hat" , "Top Gear" .)
'protective headgear' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for sunhat that I've seen before include "Summer head protector" , "Protective headgear" , "Broad-brimmed summer titfer" , "Haunts (anag.)" .)