Crossword Puzzle Makes laugh really hard

Clue: Makes laugh really hard

S/he makes 'em laugh (e.g. CIRCUSCLOWN with 11 letters)
Has a good, hard laugh (ROARS with 5 letters)
Laugh hard (HOWL with 4 letters)
Bust -- (laugh hard) (AGUT with 4 letters)
It makes it harder to drive (SLEET with 5 letters)
Makes hard to read (ENCODES with 7 letters)
Bust ____ (laugh hard) (AGUT with 4 letters)
Makes hard (STEELS with 6 letters)
Make laugh really hard (SLAY with 4 letters)
Who once remarked "You can't stay mad at somebody who makes you laugh" (LENO with 4 letters)