The prize I had as an archer (5)
I believe the answer is:
cupid
'an archer' is the definition.
(I've seen this before)
'the prize i had' is the wordplay.
'the prize' becomes 'cup' (cup is a kind of prize).
'i had' becomes 'id' (I'd).
'cup'+'id'='CUPID'
'as' acts as a link.
(Other definitions for cupid that I've seen before include "Armed boy" , "The little love god" , "Boy symbol of love" , "Tiny archer as Roman god of love" , "Love-god" .)