Take a gun to church to create a stink (6)
I believe the answer is:
stench
'a stink' is the definition.
(both can mean a bad smell)
'take a gun to church' is the wordplay.
I cannot really understand how this works, but
'gun' could be 'sten' (British sub-machine gun) and 'sten' is found within the answer.
'church' could be 'ch' (common abbreviation) and 'ch' is present in the answer.
This accounts for all the letters.
This explanation may well be incorrect...
'to create' acts as a link.
Can you help me to learn more?
(Other definitions for stench that I've seen before include "A really vile smell" , "A really foul smell" , "Unpleasant odour" , "Reek" , "Miasma" .)