Borodin's Prince (4)
I believe the answer is:
igor
'borodin's prince' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for igor that I've seen before include "Stravinsky's first name" , "Stravinsky, for example" , "Prince --, opera by Borodin" , "Card game" , "Hero of Borodin" .)