Adjust the radio? (3)
I believe the answer is:
set
I believe this clue is a double definition.
'adjust' is the first definition.
(setting is a kind of adjusting)
'the radio?' is the second definition.
(radio is a kind of set)
(Other definitions for set that I've seen before include "carriage" , "'Put, place or fix in position (3)'" , "Scenery for play or film" , "Become fixed or solid" , "Major segment of tennis match" .)