Hi

You probably need to declare some sort of variable for the movieclip to compare against

try doing something like this in the main timeline
PHP Code:
import flash.events.MouseEvent;

var 
clicked:Boolean false;

startClipButton.addEventListener(MouseEvent.CLICKstartClip);// this is other clip to be clicked

function startClip(e:MouseEvent):void
{
    
clicked = !clicked;
    
trace(clicked);
    
trashInside_mc.play();

and inside the trashInside_mc movieclip
PHP Code:
//if (parent["clicked"] === false)
if (MovieClip(parent).clicked === false)
{
    
stop();
}
else
{
    
nextFrame();

you can put all code on the main timeline really, but best get your thing working first, just mess around with it x