Unmarried albeit excited in church (8)
I believe the answer is:
celibate
'unmarried' is the definition.
(I've seen this before)
'albeit excited in church' is the wordplay.
'excited' indicates anagramming the letters.
'in' means one lot of letters goes inside another.
'church' becomes 'ce' (abbreviation for Church of England).
'albeit' with letters rearranged gives 'elibat'.
'elibat' going inside 'ce' is 'CELIBATE'.
(Other definitions for celibate that I've seen before include "Refraining from sex" , "Abstaining in the bedroom" , "Not the marrying kind" , "practising abstinence" , "Unmarried or chaste for religous reasons" .)