Proportion of bronze in a medal? (5)
I believe the answer is:
third
'proportion of bronze' is the definition.
'third' can be an answer for 'bronze' (I've seen this in another clue). I'm unsure of the 'proportion of' bit.
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for third that I've seen before include "Eroica, Beethoven's - symphony" , "33 per cent" , "Bronze prize position" , "Last of three" , "Less than half, rather" .)