Protective headgear (6)

I think it could be either:

helmet

sunhat

'protective headgear' is the definition.
(I've seen this before)

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" .)

I've seen this clue in the Irish Times, the Sydney Morning Herald, The Guardian, The Telegraph, the Newsday, The Independent and the Evening Standard.

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