Quietly show the way to pray (5)
I believe the answer is:
plead
'to pray' is the definition.
(I've seen this in another clue)
'quietly show the way' is the wordplay.
'quietly' becomes 'p' (p for piano and quiet).
'show the way' becomes 'lead' (I've seen this before).
'p'+'lead'='PLEAD'
(Other definitions for plead that I've seen before include "Supplicate" , "Make an emotional appeal" , "Appeal earnestly" , "State whether one is guilty or not" , "Beg, implore" .)