One unfinished tune live in studio (2,3)
I believe the answer is:
on air
'live in studio' is the definition.
'on air' can be an answer for 'live' (as in broadcasting live on air). I am not sure about the 'in studio' bit.
'one unfinished tune' is the wordplay.
'unfinished' means to remove the last letter.
'tune' becomes 'air' (air can mean a piece of music).
'one' with its final letter taken off is 'on'.
'on'+'air'='ON-AIR'
Can you help me to learn more?
(Other definitions for on air that I've seen before include "Broadcasting live" , "put out" , "Walk in delight here" , "If you're really happy, you'll float here" , "How one walks when elated" .)