It's said some discover ballet... (6)
I believe the answer is:
verbal
'it's said' is the definition.
(I've seen this before)
'some discover ballet' is the wordplay.
'some' indicates the answer is hidden within the clue (some of the parts of the word are used).
'VERBAL' can be found hidden inside 'discover ballet'.
(Other definitions for verbal that I've seen before include "argument" , "not written down" , "It's said" , "Communicated in words" , "Relating to words" .)