Crossword Genius

Limits on headgear (4)

Ross

I believe the answer is:

caps

This clue is a double definition.

'limits' is the first definition.
(capping is a kind of limiting)

'headgear' is the second definition.
(caps are a type of headgear)

'on' acts as a link.

(Other definitions for caps that I've seen before include "Bottle tops" , "Headgear for internationals" , "Coverings for heads or bottles" , "Style of GBS writing" , "is better" .)

I've seen this clue in The Mirror.
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