Hints about the stone being badly cut (9)
I believe the answer is:
overtones
'hints' is the definition.
(I've seen this in another clue)
'about the stone being badly cut' is the wordplay.
'about' becomes 'over' (both can mean around).
'being badly cut' indicates anagramming the letters (I've seen this in other clues).
'stone' with letters rearranged gives 'tones'.
'over'+'tones'='OVERTONES'
(Other definitions for overtones that I've seen before include "subtle innuendoes" , "Upper partials" , "Subtle implications" , "added nuances" .)