County confuses rowers with heretics (14)
I believe the answer is:
worcestershire
'county' is the definition.
(English county)
'confuses rowers with heretics' is the wordplay.
'confuses' indicates an anagram.
'with' is a charade indicator (letters next to each other).
'rowers' after 'heretics' is 'hereticsrowers'.
'hereticsrowers' anagrammed gives 'WORCESTERSHIRE'.
(Other definitions for worcestershire that I've seen before include "saucy locale?" , "English county" , "where triennial choir festival staged?" .)