Form of rap embraced by this unconventional musician (7)
I believe the answer is:
harpist
'musician' is the definition.
(I know that harpist is a type of musician)
'form of rap embraced by this unconventional' is the wordplay.
'form of' is an anagram indicator (the letters need to be in another 'form').
'embraced by' is an insertion indicator.
'unconventional' indicates anagramming the letters.
'rap' anagrammed gives 'arp'.
'this' with letters rearranged gives 'hist'.
'arp' put inside 'hist' is 'HARPIST'.
(Other definitions for harpist that I've seen before include "Instrumentalist" , "Stringed instrument player" , "musician" .)