Praise bishop? Not so much (5)
I believe the answer is:
bless
'praise' is the definition.
(I've seen this before)
'bishop? not so much' is the wordplay.
'bishop?' becomes 'b' (abbreviation used in chess).
'not so much' becomes 'less' (I've seen this before).
'b'+'less'='BLESS'
(Other definitions for bless that I've seen before include "Endow; praise" , "Praise - consecrate" , "Give honour to" , "Approve of" , "Render holy" .)