Live with a rook and huge carnivore (4)
I believe the answer is:
bear
'huge carnivore' is the definition.
(I've seen this before)
'live with a rook' is the wordplay.
'live' becomes 'be' (synonyms).
'with' means one lot of letters go next to another.
'rook' becomes 'R' (chess abbreviation).
'be'+'a'+'r'='BEAR'
'and' is the link.
(Other definitions for bear that I've seen before include "Tolerate; animal" , "One's hairy" , "Shoulder - stomach" , "Support; brutish person" , "a churlish individual" .)