Team sent back to capture live goat (4)
I believe the answer is:
ibex
'goat' is the definition.
(ibex is a kind of goat)
'team sent back to capture live' is the wordplay.
'team' becomes 'XI' (a football team, from Roman numerals for 11).
'sent back' is a reversal indicator.
'to capture' indicates putting letters inside.
'live' becomes 'be' (synonyms).
'xi' backwards is 'ix'.
'ix' placed around 'be' is 'IBEX'.
(Other definitions for ibex that I've seen before include "Mountain goat with long curved horns" , "Large-horned wild goat" , "Large-horned mountain goat" , "one seldom puts a foot wrong" , "Wild goat of North Africa" .)