Less well-known tracks around east too (7)
I believe the answer is:
besides
'too' is the definition.
(I know that too can be written as besides)
'less well-known tracks around east' is the wordplay.
'less well-known tracks' becomes 'b-sides' (songs on the backs of singles or A-sides).
'around' means one lot of letters goes inside another.
'east' becomes 'e' (synonyms).
'bsides' enclosing 'e' is 'BESIDES'.
(Other definitions for besides that I've seen before include "Anyway" , "See bids (anag)" , "Moreover" , "What's more" , "also is available" .)