Priest in charge in church producing split (7)
I believe the answer is:
crevice
'split' is the definition.
(I've seen this before)
'priest in charge in church' is the wordplay.
'priest' becomes 'rev'.
'in charge' becomes 'ic'.
'in' means one lot of letters goes inside another.
'church' becomes 'ce' (abbreviation for Church of England).
'rev'+'ic'='revic'
'revic' put into 'ce' is 'CREVICE'.
'producing' is the link.
(Other definitions for crevice that I've seen before include "Opening" , "Split" , "Narrow rock fissure" , "Narrow crack" , "Crack or fissure." .)