Answer:

talk

AnswerCrossword Clue
TALKFormat of much AM radio
TALKBe a stool pigeon
TALKLecture
TALKPopular AM radio format
TALKSuccumb to interrogation
TALKConverse
TALKYak
TALKCheap commodity?
TALKSpill the beans
TALKConfess
TALKChitchat
TALKRumors
TALKRadio format
TALKReport
TALKScuttlebutt