Most sharp statues crumble with time (8)

I believe the answer is:

astutest

'most sharp' is the definition.
(astute can mean sharp or wise)

'statues crumble with time' is the wordplay.
'crumble with' indicates an anagram.
'time' becomes 't' (abbreviation).
'statues' with its letters anagrammed with 't' can make 'ASTUTEST'.

I've seen this clue in The Guardian.

Want a hint initially instead of a full solution? Install my app