Drug overtones are feature of Breakfast In America (4,6)
I believe the answer is:
hash browns
'feature of breakfast in america' is the definition.
I don't know anything about this answer so I can't tell whether it can be defined by this definition.
'drug overtones' is the wordplay.
'drug' becomes 'hash' (hashish).
'overtones' becomes 'browns' (I can't justify this - if you can you should believe this answer much more).
'hash'+'browns'='HASH BROWNS'
'are' acts as a link.
Can you help me to learn more?
(Other definitions for hash browns that I've seen before include "potato dish" , "breakfast? Part of it, perhaps" .)