Praise a model plant (7)
I believe the answer is:
spiraea
'plant' is the definition.
(spiraea is a kind of plant)
'praise a model' is the wordplay.
'model' indicates an anagram.
'praise'+'a'='praisea'
'praisea' anagrammed gives 'SPIRAEA'.
(Other definitions for spiraea that I've seen before include "rosy flower" , "rosaceous plant" , "rose shrub" .)