Send in beer for John, maybe (7)
I believe the answer is:
apostle
'john maybe' is the definition.
(John was an apostle of Jesus)
'send in beer' is the wordplay.
'send' becomes 'post' (synonyms).
'in' is an insertion indicator.
'beer' becomes 'ale' (I've seen this before).
'post' going inside 'ale' is 'APOSTLE'.
'for' acts as a link.
(Other definitions for apostle that I've seen before include "Preacher of the gospel" , "Missionary or evangelist" , "Early Christian teacher" , "Follower of Christ" , "Good man" .)