Indebted veteran stuffs live chicken (8)
I believe the answer is:
beholden
'indebted' is the definition.
(I've seen this in another clue)
'veteran stuffs live chicken' is the wordplay.
'veteran' becomes 'old' (I've seen this in another clue).
'stuffs' means one lot of letters goes inside another.
'live' becomes 'be' (synonyms).
'chicken' becomes 'hen' (hen is a kind of chicken).
'be'+'hen'='behen'
'old' put within 'behen' is 'BEHOLDEN'.
(Other definitions for beholden that I've seen before include "Owing gratitude (to)" , "Bound" , "Under an obligation" , "Owing thanks, indebted" , "Obliged" .)