Ringer Andy rocking church in seductive act (5,5)
I believe the answer is:
belly dance
'seductive act' is the definition.
(potentially seductive dance)
'ringer andy rocking church' is the wordplay.
'ringer' becomes 'bell' (a bell rings).
'rocking' is an anagram indicator.
'church' becomes 'CE' (abbreviation for Church of England).
'andy' anagrammed gives 'ydan'.
'bell'+'ydan'+'ce'='BELLY-DANCE'
'in' acts as a link.
(Other definitions for belly dance that I've seen before include "Shaky performance" , "Sensuous performance of Middle Eastern origin" , "Exciting performance" , "Entertaining manipulation of middle" .)