Communication device (5)
(Other definitions for radio that I've seen before include "Communications receiver" , "Broadcast medium" , "Communications medium" , "Speech receiver" , "means of communication" .)
'communication device' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for phone that I've seen before include "Call; eg, mobile" , "Receiver" , "Communications device" , "Ring (someone)" , "Short piece of electronic equipment" .)
'communication device' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for telephone that I've seen before include "Communicating tool" , "Book with an alphabetical list of subscribers and numbers" , "Call, ring" , "Worldwide system of communication" , "Electronic voice transmitter" .)