One may be also known by another name, not a drug (9)
I believe the answer is:
digitalis
'drug' is the definition.
(I've seen this before)
'one may be also known by another name not a' is the wordplay.
I cannot really see how this works, but
'one' could be 'li' (I've seen this in other clues) and 'li' is found within the answer.
'name' could be 'di' and 'di' is found within the answer.
'a' is found in the answer.
The remaining letters 'gits' is a valid word which might be clued in a way I don't see.
This may be the basis of clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for digitalis that I've seen before include "Drug derived from foxglove leaves" , "medicinal drug" , "Heart drug prepared from foxglove leaves" , "Cardiac stimulant prepared from 11" , "plant making this drug?" .)