Trapper to supply food outside church (7)

I believe the answer is:
catcher
'trapper' is the definition.
The answer and definition can be both people as well as being singular nouns.
Perhaps there's a link between them I don't understand?
'supply food outside church' is the wordplay.
'supply food' becomes 'cater' (synonyms).
'outside' is an insertion indicator (some letters go outside others).
'church' becomes 'ch' (abbreviation on maps etc).
'cater' enclosing 'ch' is 'CATCHER'.
'to' acts as a link.
Can you help me to learn more?
(Other definitions for catcher that I've seen before include "fisherman maybe" , "Baseball fielder" , "J D Salinger wrote 'The . . . . . . . in the Rye'" , "J D Salinger write ''The . . . . . . . in the Rye''" , "Baseball player - in the rye?" .)
