Study contents of comic and state, maybe, that it relates to particular religion (14)

'that it relates to particular religion' is the definition.
I can't tell whether this definition defines the answer.

'study contents of comic and state' is the wordplay.
'study' becomes 'den' (den can mean an office or study).
'contents of' means to look at the middle letters (the letters on the inside of the word).
'and' says to put letters next to each other.
'state' becomes 'national' (I can't explain this - if you can you should give a lot more credence to this answer).
The middle letters of 'comic' are 'omi'.
'den'+'omi'+'national'='DENOMINATIONAL'

'maybe' is the link.

Can you help me to learn more?