Charlie and Michael distributed methamphetamine, perhaps (8)
I believe the answer is:
chemical
'methamphetamine perhaps' is the definition.
(I know that Methedrine is a type of drug)
'charlie and michael distributed' is the wordplay.
'charlie' becomes 'C' (phonetic alphabet).
'and' is a charade indicator (letters next to each other).
'distributed' indicates an anagram.
'michael' anagrammed gives 'hemical'.
'c'+'hemical'='CHEMICAL'
(Other definitions for chemical that I've seen before include "Of the interactions of substances" , "Laboratory substance" , "Of a substance such as ethanol" , "Relating to composition and properties of substances" , "One may react" .)