He brings a quick end to the wild deer (5)
I believe the answer is:
derek
'he' is the definition.
'a quick end to the wild deer' is the wordplay.
'end' suggests the final letters.
'to' is a charade indicator (letters next to each other) (I've seen this in other clues).
'the wild' indicates an anagram.
The last letter of 'quick' is 'k'.
'deer' anagrammed gives 'dere'.
'k' put after 'dere' is 'DEREK'.
'brings' is the link.
(Other definitions for derek that I've seen before include "Sir - - Jacobi (actor)" , "- and the Dominos was Eric Clapton's band" , "Fellow" , "Man's name" .)