Answer: callletters

AnswerCrossword Clue
CALLLETTERS

WKRP, for instance

CALLLETTERS

Ham operator's designated sign

CALLLETTERS

Radio station ID

CALLLETTERS
Radio station's identifier
CALLLETTERS
WQXR, for example
CALLLETTERSWKRP or WJM-TV
CALLLETTERSWKRP, e.g.
CALLLETTERSCorrespondence to the editor of an Allentown newspaper?
CALLLETTERSStation identification
CALLLETTERSRadio station identification