Eat lamb up that gets left for a rissole (8)
I believe the answer is:
meatball
'a rissole' is the definition.
(I've seen this before)
'eat lamb up that gets left' is the wordplay.
'up' indicates anagramming the letters (letters get chucked up).
'that gets' is an insertion indicator (gets can mean captures or absorbs).
'left' becomes 'l' (common abbreviation).
'eat'+'lamb'='eatlamb'
'eatlamb' is an anagram of 'meatbal'.
'meatbal' going around 'l' is 'MEATBALL'.
'for' acts as a link.
(Other definitions for meatball that I've seen before include "Globular food item" , "Small sphere of minced beef" , "Spherical mould of minced or chopped beef, pork or lamb" , "faggot" , "Lump of seasoned mince" .)