Animal on the loose in gorge (3,3)
I believe the answer is:
pig out
'gorge' is the definition.
('pig out' can be a synonym of 'gorge')
'animal on the loose in' is the wordplay.
'animal' becomes 'pig' (I've seen this in other clues).
'on' is a charade indicator (letters next to each other).
'the loose in' becomes 'out' (I can't justify this - if you can you should give a lot more credence to this answer).
'pig'+'out'='PIG OUT'
Can you help me to learn more?
(Other definitions for pig out that I've seen before include "go on a binge" , "To eat a lot may" , "overindulge" , "gorge" , "feast" .)