Beat bronze (3)
I believe the answer is:
tan
I believe this clue is a double definition.
'beat' is the first definition.
(I've seen this before)
'bronze' is the second definition.
('tan' can be a synonym of 'bronze')
(Other definitions for tan that I've seen before include "Brown to beat" , "Bark!" , "Beat the colour" , "Nice brown induced by sun" , "function" .)