Love working like an animal (4)
I believe the answer is:
vole
'an animal' is the definition.
(thesaurus)
'love working' is the wordplay.
'working' indicates anagramming the letters.
'love' anagrammed gives 'VOLE'.
'like' is the link.
(Other definitions for vole that I've seen before include "A little rodent" , "River bank rodent" , "Small burrowing animal - love it" , "A small plant-eating rodent - love it" , "creature" .)