Cockney house landlord not finishing simple meal (8)
I believe the answer is:
omelette
'simple meal' is the definition.
(omelettes are simple to make)
'cockney house landlord not finishing' is the wordplay.
'cockney house' becomes ''ome' ('home' - homing is a kind of housing - said with a cockney accent, dropping the 'H').
'landlord' becomes 'letter' (landlords let property).
'not finishing' means to remove the last letter.
'letter' with its last letter removed is 'lette'.
'ome'+'lette'='OMELETTE'
(Other definitions for omelette that I've seen before include "You can't make one without breaking eggs" , "something tasty" , "Item of food i" , "Dish of cooked beaten eggs" , "Food dish (that can't be made without breaking eggs)" .)