Shrewd form of statue (6)
I believe the answer is:
astute
'shrewd' is the definition.
(synonyms)
'form of statue' is the wordplay.
'form of' indicates anagramming the letters (another form of the same letters).
'statue' anagrammed gives 'ASTUTE'.
(Other definitions for astute that I've seen before include "Clever and crafty" , "'Perceptive, shrewd (6)'" , "Able to assess (people or situations) accurately" , "Subtle" , "Clever and canny" .)