Commendation priceless originally, it is beyond praise (7)
I believe the answer is:
plaudit
'commendation' is the definition.
(I know that plaudit is a type of commendation)
'priceless originally it is beyond praise' is the wordplay.
'originally' says to take the initial letters.
'is beyond' is a charade indicator (letters next to each other).
'praise' becomes 'laud' (lauding is a kind of praising).
The initial letter of 'priceless' is 'p'.
'it' put after 'laud' is 'laudit'.
'p'+'laudit'='PLAUDIT'
(Other definitions for plaudit that I've seen before include "Praise, accolade" , "Round of applause" , "Salute" , "Acclaim" , "Expression of praise or approval" .)