Not so high praise (7)
I believe the answer is:
flatter
'praise' is the definition.
(flattering is a kind of praising)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for flatter that I've seen before include "sugar" , "Comparatively deflated" , "Compliment dishonestly" , "resort to cajolery" , "more lifeless" .)