Pagan: let's not have cold chicken! (7)
I believe the answer is:
heathen
'pagan' is the definition.
(I know that pagan can be written as heathen)
'let's not have cold chicken' is the wordplay.
I cannot really see how this works, but
'have' could be 'eat' (eating is a kind of having) and 'eat' is found within the answer.
'chicken' could be 'hen' (hen is a kind of chicken) and 'hen' is located in the answer.
A single letter 'h' remains which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for heathen that I've seen before include "One who doesn't acknowledge your god" , "Non-believer" , "Unbeliever" , "Uncultured" , "Godless person" .)