Wild animal eating half of best legume (4,4)
I believe the answer is:
lima bean
'legume' is the definition.
(I know that lima bean is a type of shell bean)
'wild animal eating half of best' is the wordplay.
'wild' indicates anagramming the letters.
'eating' means one lot of letters goes inside another.
'half of' suggests halving the letters.
'animal' with letters rearranged gives 'limaan'.
'best' halved is 'be'.
'limaan' enclosing 'be' is 'LIMA BEAN'.
(Other definitions for lima bean that I've seen before include "food supplier" , "F - with 12a" , "Pulse" , "vegetable" , "plant species" .)