Country music from sad dope (9)
I believe the answer is:
bluegrass
'country music' is the definition.
(I've seen this before)
'sad dope' is the wordplay.
'sad' becomes 'blue' (similar in meaning).
'dope' becomes 'grass' (synonyms).
'blue'+'grass'='BLUEGRASS'
'from' acts as a link.
(Other definitions for bluegrass that I've seen before include "Style of country music from Kentucky" , "American hillbilly music" , "Kind of country music" , "Style of US country music" , "nickname of US State" .)