Keen to embrace good retro music (6)
I believe the answer is:
reggae
'music' is the definition.
(reggae is a kind of music)
'keen to embrace good retro' is the wordplay.
'keen' becomes 'eager' (I've seen this before).
'to embrace' means one lot of letters goes inside another.
'good' becomes 'g' (abbreviation).
'retro' is a reversal indicator (retro is Latin for 'backwards').
'eager' going around 'g' is 'eagger'.
'eagger' back-to-front is 'REGGAE'.
(Other definitions for reggae that I've seen before include "A Caribbean music style" , "Popular music of the West Indies" , "Type of West Indian music" , "Type of music developed in Jamaica in the 1960s" , "Jamaican music style" .)