Cross-dressing Shakespearean music maker (5)
I believe the answer is:
viola
'music maker' is the definition.
(viola is a kind of musical instrument)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for viola that I've seen before include "Page" , "big fiddle!" , "Bowed instrument slightly larger than a violin" , "Sebastian's sister" , "one used to bowing?" .)