I see 14 now - I had FR as the religious man, and In pa(i)n as fried or possibly frier, but couldn't see how CRIED could lose only one letter to become IED or IER.
It was 5 down whose wordplay I couldn't see.
I now have the completed grid and all the extra letters and they mean absolutely nothing, though there is a 3-letter word in the middle which does not define any of the 6 words I have from the wordplay-only down answers.