Possible aim of epidural containing last of ethanol, solvent (2,3,5)
I believe the answer is:
in the black
'solvent' is the definition.
(I've seen this in another clue)
I can't explain the rest of the clue.
(Other definitions for in the black that I've seen before include "widow may be seen thus" , "Funeral directors are usually" , "Solvent; out of debt" , "Where roulette ball may land" , "able to pay debts" .)