Communal society is tough to consume the drug (6)
I believe the answer is:
shared
'communal' is the definition.
(I've seen this before)
'society is tough to consume the drug' is the wordplay.
'society' becomes 's' (common abbreviation in names of organisations).
'is tough' becomes 'hard' (similar in meaning).
'to consume' means one lot of letters goes inside another.
'the drug' becomes 'e' (e is another name for ecstasy).
'hard' going around 'e' is 'hared'.
's'+'hared'='SHARED'
(Other definitions for shared that I've seen before include "Participated in" , "Meted out, allotted portions" , "Possessed in common" , "Went halves" , "Used by more than one" .)