In hutch I'm petting animal (5)
I believe the answer is:
chimp
'animal' is the definition.
(short for chimpanzee)
'in hutch i'm petting' is the wordplay.
'in' indicates a hidden word.
'CHIMP' is hidden in the letters of 'hutch im petting'.
(Other definitions for chimp that I've seen before include "Cheeky primate" , "Ape (colloq.)" , "Arboreal ape from equatorial Africa (abbr)" , "Anthropoid ape" , "A great ape (abbr.)" .)