Element of victory? (4)
I believe the answer is:
gold
I believe this clue is a double definition.
'element' is the first definition.
(I know that gold is a type of metal)
'victory?' is the second definition.
(gold can mean victory in sporting events)
'of' acts as a link.
(Other definitions for gold that I've seen before include "Thin sheet of precious metal" , "Colour of archery target's centre" , "Valuable metal" , "Au - metal" , "Element (Au)" .)