Grace needing tablet, say, breaking arm (8)
I believe the answer is:
elegance
'grace' is the definition.
(I've seen this in another clue)
'tablet say breaking arm' is the wordplay.
'tablet' becomes 'e' (E can mean ecstasy or an ecstasy tablet).
'say' becomes 'eg' (both can mean for example).
'breaking' means one lot of letters goes inside another.
'arm' becomes 'lance' (lance is a kind of arm).
'eg' placed inside 'lance' is 'legance'.
'e'+'legance'='ELEGANCE'
'needing' acts as a link.
(Other definitions for elegance that I've seen before include "Sophistication" , "Graceful style" , "Graceful refinement" , "Gracefulness" , "Style; refinement" .)