A female to make sweet music with? (5)
I believe the answer is:
Here is my best explanation:
'sweet music with?' is the definition.
I can't tell whether this definition defines the answer.
'a female to' is the wordplay.
'a female' becomes 'vi' (short for Violet, a woman's name).
'to' becomes 'ola' (I can't justify this - if you can you should believe this answer much more).
'make' is the link.
(Other definitions for viola that I've seen before include "One played", "Sebastian's twin (Twelfth Night)", "Shakespearean character", "Large violin", "Pansy-like flower", "Bowed string instrument", "Bloomer", "Fiddle", "Achievement" and "Twelfth Night heroine".)