Freely I stream their wonderful music-making (7)
I believe the answer is:
maestri
'their wonderful music-making' is the definition.
I can't judge whether this defines the answer.
'freely i stream' is the wordplay.
'freely' indicates anagramming the letters.
'i'+'stream'='istream'
'istream' anagrammed gives 'MAESTRI'.
(Other definitions for maestri that I've seen before include "Experts" , "leading musicians" , "Famous conductors" , "Distinguished conductors" , "great musicians" .)