Song provided by duo without piano (3)
I believe the answer is:
air
'song' is the definition.
(thesaurus)
'duo without piano' is the wordplay.
'duo' becomes 'pair' ('pair' can be a synonym of 'duo').
'without' indicates named letters should be taken away.
'piano' becomes 'p'.
'pair' with 'p' taken out is 'AIR'.
'provided by' is the link.
(Other definitions for air that I've seen before include "Ventilate with oxygen" , "'Tune, melody (3)'" , "Musical composition" , "character" , "Element; tune" .)