Instrument from radio car in America (7)
I believe the answer is:
ocarina
'instrument' is the definition.
(I know that ocarina is a type of wind)
'from radio car in america' is the wordplay.
'from' indicates a hidden word.
'OCARINA' can be found hidden inside 'radio car in america'.
(Other definitions for ocarina that I've seen before include "Egg-shaped type of flute" , "Egg-shaped wind instrument with finger holes" , "Inca oar made into a musical instrument" , "Bird-shaped flute" , "dated instrument" .)