Brook providing drinks outside the church (7)

'brook' is the definition.
I know nothing about this answer so I cannot tell whether this works.

'drinks outside the church' is the wordplay.
'drinks' becomes 'beers' (beer is a kind of drink).
'outside' means one lot of letters goes inside another (some letters go outside others).
'the church' becomes 'ch' (abbreviation on maps etc).
'beers' enclosing 'ch' is 'BECHERS'.

'providing' is the link.

Can you help me to learn more?