Mallard's rear hunter shot with loud noise (7)
I believe the answer is:
thunder
'loud noise' is the definition.
(I've seen this before)
'mallard's rear hunter shot' is the wordplay.
'rear' says to take the final letters (the back of the word).
'shot' is an anagram indicator.
The last letter of 'mallard' is 'd'.
'd'+'hunter'='dhunter'
'dhunter' is an anagram of 'THUNDER'.
'with' is the link.
(Other definitions for thunder that I've seen before include "Loud and prolonged noise in the sky" , "Rumble after lightning" , "Stormy peal" , "Heavenly rumbling" , "Loud rumbling noise" .)