Victor paid off, being feeble (5)
I believe the answer is:
vapid
'feeble' is the definition.
(vapid can mean feeble or spiritless)
'victor paid off' is the wordplay.
'victor' becomes 'V' (phonetic alphabet: alpha, bravo, charlie etc.).
'off' indicates anagramming the letters.
'paid' anagrammed gives 'apid'.
'v'+'apid'='VAPID'
'being' is the link.
(Other definitions for vapid that I've seen before include "Insipid or uninteresting" , "Lacking flavour" , "Insipid, empty" , "no interest" , "Offering no stimulation" .)