Criticise Sunday dinner (5)
I believe the answer is:
roast
I believe this is a double definition.
'criticise' is the first definition.
(I've seen this before)
'sunday dinner' is the second definition.
(a roast dinner is often eaten on Sunday)
(Other definitions for roast that I've seen before include "Grill" , "Cook in closed oven" , "Heavily criticise" , "Cook (meat) over a fire" , "Be uncomfortably hot" .)