Answer: fanmail

AnswerCrossword Clue
FANMAIL

Missive to Madonna, say

FANMAIL

It gets sent to stars

FANMAIL

Transmission to the stars

FANMAIL
Studio delivery
FANMAIL
Autograph requests, effusive compliments, etc.
FANMAILTeen idol's sackful
FANMAILAdmiration by post.
FANMAILSecretary's problem.
FANMAILStar's reading matter
FANMAILLetters to stars
FANMAILDon't pass around one thousand letters to movie stars (3,4)
FANMAILLetter from an admirer with cooler armor (3,4)
FANMAILMeans of reaching the stars
FANMAILSackful for a star
FANMAILLetters of approval
FANMAILGushing letters