Old footballer yet to be paid (5)
I believe the answer is:
owing
'yet to be paid' is the definition.
(I've seen this before)
'old footballer' is the wordplay.
'old' becomes 'o' (abbreviation).
'footballer' becomes 'wing' (I've seen this in other clues).
'o'+'wing'='OWING'
(Other definitions for owing that I've seen before include "Outstanding as a debt" , "(Of money) outstanding" , "This debt has yet to be paid" , "Unpaid" , "Unsettled; on account" .)