Is “Muso” a Scrabble word?
Yes
MUSO
Valid in at least one Scrabble dictionary
Valid in these dictionaries
SOWPODS / CSW
Scrabble UK & International
TWL / NWL
Scrabble North America
Large English Dictionary
General English word list
Meaning of Muso
noun
1.A composer, conductor, or performer of music; specifically, a person who sings and/or plays a musical instrument as a hobby, an occupation, or a profession.