1) An act of betrayal 2) Australian game show 3) Be untrue 4) Betrayal 5) Box office triumph 6) Cause of an SRO sign 7) Commercial bonanza 8) Full house, at the theater 9) Good news for scalpers 10) Hit show 11) No more seats situation 12) Perfidy 13) SRO cause 14) SRO occasion 15) Super bowl, usually 1) Hit 2) Smash hit 3) Traitor 
[n] - an act of betrayal
noun an act of betrayal