Answer:

standupcomic

Answer	Crossword Clue
STANDUPCOMIC	USO entertainer
STANDUPCOMIC	Berle or Youngman
STANDUPCOMIC	Seinfeld, for one

STANDUPCOMIC	Lineman?
STANDUPCOMIC	Professional joke teller

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.