A machine to tune with skill (8)
I believe the answer is:
aircraft
'a machine' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Perhaps you can see an association between them that I don't see?
'tune with skill' is the wordplay.
'tune' becomes 'air' (air can mean a piece of music).
'with' is a charade indicator (letters next to each other).
'skill' becomes 'craft' (craft is a kind of skill).
'air'+'craft'='AIRCRAFT'
'to' acts as a link.
Can you help me to learn more?
(Other definitions for aircraft that I've seen before include "flyers" , "Flying machines" , "Flying machine" , "Helicopters, gliders, etc." , "Flier" .)