Answer: intruders

AnswerCrossword Clue
INTRUDERSGate-crashers
INTRUDERSGate crashers.
INTRUDERSButtinskis
INTRUDERSThey're not on the guest list
INTRUDERSCrashers, e.g.
intrudersA person who intrudes, esp. into a building with criminal intent
intrudersINTRUDER, one who intrudes (to thrust or force oneself in)