Wild animals munched oranges (7)
I believe the answer is:
onagers
'wild animals' is the definition.
(I've seen this before)
'munched oranges' is the wordplay.
'munched' is an anagram indicator (letters munched or crushed into a new order).
'oranges' with letters rearranged gives 'ONAGERS'.
(Other definitions for onagers that I've seen before include "Asiatic wild asses" , "Strange oranges for the wild asses" , "Asian wild asses" , "wild animals" .)