Brought back from Harlem, a new type of paint (6)
I believe the answer is:
'type of paint' is the definition.
(I've seen this before)
'brought back from harlem a new' is the wordplay.
'brought back' shows that the letters should be reversed in order.
'from' says the answer is hidden in the clue.
'lemane' is hidden within 'harlem a new'.
'lemane' written backwards gives 'ENAMEL'.
(Other definitions for enamel that I've seen before include "Dental material" , "art form" , "Hard gloss paint" , "Smooth hard paint" , "Vitrified coating for metal etc" .)