Stay frenziedly ingesting drug, getting purple (8)
I believe the answer is:
amethyst
'purple' is the definition.
(thesaurus)
'stay frenziedly ingesting drug' is the wordplay.
I cannot quite see how this works, but
'drug' could be 'meth' (meth is a kind of drug) and 'meth' is present in the answer.
an anagram of 'stay' is 'ayst' which is within the remaining letters.
No letters remain.
This may be the basis of clue (or it may be nonsense).
'getting' is the link.
Can you help me to learn more?
(Other definitions for amethyst that I've seen before include "Variety of quartz" , "Purple quartz, used as a gemstone" , "what's in ring" , "Transparent bluish quartz" , "Purple gem" .)