Play outside church with old Greek coin (7)
I believe the answer is:
drachma
'old greek coin' is the definition.
(I've seen this in another clue)
'play outside church' is the wordplay.
'play' becomes 'drama' (synonyms).
'outside' indicates putting letters inside (some letters go outside others).
'church' becomes 'ch' (abbreviation on maps etc).
'drama' going around 'ch' is 'DRACHMA'.
'with' acts as a link.
(Other definitions for drachma that I've seen before include "money in the past" , "Former unit of money in Greece" , "Former Greek currency unit" , "European currency replaced by the euro in 2002" , "Old brass" .)