Drag out religious pamphlet written by an expert? (8)
I believe the answer is:
protract
'drag out' is the definition.
(thesaurus)
'religious pamphlet written by an expert?' is the wordplay.
'religious pamphlet' becomes 'tract' (I've seen this before).
'written by' means one lot of letters go next to another.
'an expert?' becomes 'pro' (I've seen this before).
'tract' put after 'pro' is 'PROTRACT'.
(Other definitions for protract that I've seen before include "Increase" , "Draw out, lengthen the time" , "Draw out, prolong" , "Extend length" , "Stretch out" .)