B-minus getting praise (5)
I believe the answer is:
bless
'praise' is the definition.
(thesaurus)
'b-minus getting' is the wordplay.
'minus' becomes 'less' (I've seen this before).
'getting' means one lot of letters go next to another.
'b'+'less'='BLESS'
(Other definitions for bless that I've seen before include "Invoke divine favour on" , "Pray for" , "set aside for holy purpose?" , "Give benediction" , "Isn't that sweet?" .)