Give instruction in church after a meal (5)
I believe the answer is:
teach
'give instruction' is the definition.
(I've seen this before)
'church after a meal' is the wordplay.
'church' becomes 'ch' (common abbreviation).
'after' is a charade indicator (letters next to each other).
'a meal' becomes 'tea' (tea is a type of meal).
'ch' after 'tea' is 'TEACH'.
'in' acts as a link.
(Other definitions for teach that I've seen before include "Cheat (anag)" , "Educate 4 across" , "show" , "Tutor" , "Impart skills or 3 down" .)