Having suit inside out in church is uncouth (6)
I believe the answer is:
rustic
'uncouth' is the definition.
(rustic can uncouth or unrefined)
'having suit inside out in' is the wordplay.
'having' becomes 'rc' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'inside out' is an anagram indicator (a distorted or inside out version of the letters).
'in' means one lot of letters goes inside another.
'suit' is an anagram of 'usti'.
'rc' going around 'usti' is 'RUSTIC'.
'church is' acts as a link.
This may not be right. Some or all of it may be part of another bit of the clue.
(Other definitions for rustic that I've seen before include "Hodge" , "unrefined" , "Bucolic, pastoral" , "Characteristic of country life" , "Simple and unsophisticated as of the countryside" .)