Answer: demotapes

AnswerCrossword Clue
DEMOTAPES

Aspiring rock star's submissions

DEMOTAPES

Amateur musician's samples

DEMOTAPES

Rock samples?

DEMOTAPES
Would-be rock stars' recordings
DEMOTAPES
Band aids
DEMOTAPESRock samples
DEMOTAPESMailings from people without labels?
DEMOTAPESThey're filled with unknowns
DEMOTAPESRecord executive's stack
DEMOTAPESThings mailed without a label?