Intended following Scotsman at church (6)
I believe the answer is:
fiance
'intended' is the definition.
(someone's 'intended' is who they are due to marry)
'following scotsman at church' is the wordplay.
'following' becomes 'f' (used when citing page numbers etc).
'scotsman' becomes 'ian' (common Scottish name).
'at' means one lot of letters go next to another.
'church' becomes 'CE' (Church of England).
'f'+'ian'+'ce'='FIANCE'
(Other definitions for fiance that I've seen before include "He's going to marry" , "The man she is going to marry" , "Engaged male" , "One engaged to marry" , "Prospective groom" .)