A little lamb (4)
I believe the answer is:
loin
'a little lamb' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for loin that I've seen before include "Joint of meat" , "Lumbar region" , "Part of a carcase" , "Meat between the ribs and rump of an animal" , "Part of body between ribs and hip-bone" .)