Temptation to consume drug is for relaxation (7)
I believe the answer is:
leisure
'relaxation' is the definition.
(leisure is a kind of relaxation)
'temptation to consume drug is' is the wordplay.
'temptation' becomes 'lure' (lure is a kind of temptation).
'to consume' is an insertion indicator.
'drug' becomes 'e' (e is another name for ecstasy).
'e'+'is'='eis'
'lure' enclosing 'eis' is 'LEISURE'.
'for' acts as a link.
(Other definitions for leisure that I've seen before include "Freedom from work" , "Use lire (anag)" , "casual wear" , "R&R" , "days off" .)