Current row involving church is more irritating (7)
I believe the answer is:
itchier
'more irritating' is the definition.
(I've seen this before)
'current row involving church' is the wordplay.
'current' becomes 'I' (symbol for electric current).
'row' becomes 'tier' (a tier is a row of things).
'involving' means one lot of letters goes inside another.
'church' becomes 'ch' (common abbreviation).
'tier' placed around 'ch' is 'tchier'.
'i'+'tchier'='ITCHIER'
'is' acts as a link.
(Other definitions for itchier that I've seen before include "burning intensely!" , "More fidgety, more restless" , "Comparatively irritating" , "more annoying" , "more likely to prickle?" .)