Experience religious education and I have to support church (7)
I believe the answer is:
receive
'experience' is the definition.
(I know that experience can be written as receive)
'religious education and i have to support church' is the wordplay.
'religious education' becomes 'RE' (abbreviation).
'and' means one lot of letters go next to another.
'i have' becomes 'I've' (contraction of 'I have').
'to support' means one lot of letters go next to another (in a down clue, some letters hold up others).
'church' becomes 'CE' (abbreviation for Church of England).
'ive' after 'ce' is 'ceive'.
're' next to 'ceive' is 'RECEIVE'.
(Other definitions for receive that I've seen before include "harbour" , "Welcome; be given" , "Get" , "Accept; greet" , "Be given (something)" .)