Name location on the radio (4)
I believe the answer is:
cite
'name' is the definition.
(I've seen this in other clues)
'location on the radio' is the wordplay.
'location' becomes 'site' (site is a kind of location).
'on the radio' indicates a 'sounds like' (homophone) clue.
'site' sounds like 'CITE'.
(Other definitions for cite that I've seen before include "name" , "Quote (eg, a book)" , "Quote or refer to" , "Mention as example or quote" , "Repeat a passage from some written work" .)