The majority of jungle beasts confronting small rabbit-like creature (5,5)
I believe the answer is:
lions share
'the majority' is the definition.
'jungle beasts confronting small rabbit-like creature' is the wordplay.
'jungle beasts' becomes 'lions'.
'confronting' is a charade indicator (letters next to each other).
'small' becomes 's' (abbreviation - e.g. clothes size).
'rabbit-like creature' becomes 'hare' (I've seen this before).
'lions'+'s'+'hare'='LIONS SHARE'
'of' is the link.
(Other definitions for lions share that I've seen before include "Largest portion" , "Main part" , "Largest part" , "For the greater part" , "Principal part" .)