Have a meal, warm, without husband (3)
I believe the answer is:
eat
'have a meal' is the definition.
(I've seen this before)
'warm without husband' is the wordplay.
'warm' becomes 'heat'.
'without' suggests deleting specific letters.
'husband' becomes 'h'.
'heat' with 'h' removed is 'EAT'.
(Other definitions for eat that I've seen before include "Take food" , "Do cats - bats? Do bats - cats? (Alice in Wonderland)" , "Use a knife and fork" , "put away" , "Partake of" .)