Suave young socialite sent out for broadcasting (2,3)
I believe the answer is:
on air
'broadcasting' is the definition.
(broadcasting on the air)
'suave young socialite sent out' is the wordplay.
'suave' becomes 'debonair' (synonyms).
'young socialite' becomes 'deb' (debutante).
'sent out' indicates named letters should be taken away.
'debonair' with 'deb' removed is 'ON-AIR'.
'for' acts as a link.
(Other definitions for on air that I've seen before include "Radio show might be" , "Cushioned" , "How one walks when elated" , "In the process of broadcasting - floating aloft?" , "Broadcasting at this moment" .)