Rupert met fantastic musician (9)
I believe the answer is:
trumpeter
'musician' is the definition.
(trumpeter is a kind of musician)
'rupert met fantastic' is the wordplay.
'fantastic' is an anagram indicator.
'rupert'+'met'='rupertmet'
'rupertmet' anagrammed gives 'TRUMPETER'.
(Other definitions for trumpeter that I've seen before include "Musician" , "loud-voiced bird" , "Brass player" , "Elephant perhaps" , "Jumbo?" .)