Tragic female's drug dealing admission? (6)
I believe the answer is:
'tragic female's' is the definition.
(tragic mythological figure)
'drug dealing admission?' is the wordplay.
I cannot really see how this works, but
'drug' could be 'e' (E is another name for ecstasy) and 'e' is found in the answer.
The remaining letters 'isold' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
(Other definitions for isolde that I've seen before include "princess of legend" , "Soiled like Tristram's love" , "Arthurian queen" , "heroine (sic)" , "King Mark's betrothed (Wagner)" .)