Drugs we hear to bring you peace (4)
I believe the answer is:
ease
'peace' is the definition.
(I've seen this in another clue)
'drugs we hear' is the wordplay.
'drugs' becomes 'es' (ecstasy tablets).
'we hear' indicates a 'sounds like' (homophone) clue.
'es' is a homophone of 'EASE'.
'to bring you' is the link.
(Other definitions for ease that I've seen before include "Rest and leisure" , "Freedom from worries" , "Freedom from pain or anxiety" , "Effortlessness" , "Affluence" .)