Pass line entering English part of church (6)
I believe the answer is:
elapse
'pass' is the definition.
(I've seen this before)
'line entering english part of church' is the wordplay.
'line' becomes 'l'.
'entering' is an insertion indicator.
'english' becomes 'e' (abbreviation).
'part of church' becomes 'apse' ('apse' is part of 'church').
'e'+'apse'='eapse'
'l' put into 'eapse' is 'ELAPSE'.
(Other definitions for elapse that I've seen before include "Slip away" , "Tick by" , "Glide by" , "Passing" , "Pass away - asleep (anag)" .)