Policeman keeping hot butcher's requirement (7)
I believe the answer is:
chopper
'requirement' is the definition.
Although both the answer and definition are singular nouns, I don't understand how they can define each other.
'policeman keeping hot butcher's' is the wordplay.
'policeman' becomes 'copper' (copper is a kind of policeman).
'keeping' means one lot of letters goes inside another.
'hot butcher' becomes 'h' (I can't explain this - if you can you should give a lot more credence to this answer).
'copper' going around 'h' is 'CHOPPER'.
Can you help me to learn more?
(Other definitions for chopper that I've seen before include "type of aircraft" , "Motorbike" , "Lizzie Borden" , "Small axe" , "Blade" .)