Warm through hearts and enjoy meal (4)
I believe the answer is:
heat
'warm' is the definition.
(thesaurus)
'through hearts and enjoy meal' is the wordplay.
'through' becomes 'until' (I've seen this in another clue).
'hearts' means to look at the middle letters.
'and' says to put letters next to each other.
'enjoy meal' becomes 'hea' (I can't explain this - if you can you should give a lot more credence to this answer).
The middle letter of 'until' is 't'.
't' after 'hea' is 'HEAT'.
Can you help me to learn more?
(Other definitions for heat that I've seen before include "Energy that causes a rise in temperature" , "Warm up" , "brings out a sweat?" , "Raise temperature" , "High temperature" .)