Commend, extol (6)
I believe the answer is:
praise
This clue is a double definition.
'commend' is the first definition.
(I know that commend is a more specific form of the action praise)
'extol' is the second definition.
(I know that extol is a more specific form of the action praise)
(Other definitions for praise that I've seen before include "Applaud, commend" , "Eulogise" , "Be aware of (something)" , "flatter" , "Approve and commend" .)