Henry and Alan's meat conforming to religious law (5)
I believe the answer is:
halal
'meat conforming to religious law' is the definition.
I can't tell whether this defines the answer.
'henry and alan's' is the wordplay.
'henry' becomes 'hal' (short for Henry).
'and' means one lot of letters go next to another.
'alan's' becomes 'al' (I can't explain this - if you can you should give a lot more credence to this answer).
'hal'+'al'='HALAL'
Can you help me to learn more?
(Other definitions for halal that I've seen before include "lawfully killed" , "authorised food" , "OK for Muslims to eat" , "Meat slaughtered in accordance with Islamic law" , "(Meat) from animals slaughtered according to Muslim law" .)