Sharp statue design (6)
I believe the answer is:
astute
'sharp' is the definition.
(synonyms)
'statue design' is the wordplay.
'design' indicates an anagram.
'statue' is an anagram of 'ASTUTE'.
(Other definitions for astute that I've seen before include "Wise" , "Shrewd and clever" , "Sharp-witted" , "intelligent" , "Subtle" .)