Drugs reported to aid peacefulness (4)
I believe the answer is:
ease
'aid peacefulness' is the definition.
'ease' can be an answer for 'peacefulness' (I've seen this in another clue). I'm not certain of the 'aid' bit.
'drugs reported' is the wordplay.
'drugs' becomes 'es' (E is a term for an ecstasy pill).
'reported' shows a homophone (sound like).
'es' is a homophone of 'EASE'.
'to' is the link.
Can you help me to learn more?
(Other definitions for ease that I've seen before include "Soothe" , "Absence of effort" , "Affluence" , "Assuage" , "Absence of hardship" .)