If you're on a STAR, you don't have many options. My own favoured option is point the nose down into a Stuka dive- you lose energy gaining speed and descending rapidly, and bleeding it off again is better than a steady descent. Also we don't usually have solid 250kt/10,000' restrictions over here. But on a STAR, speedbrake and look where the green line goes, if still no good, dump the gear. If that will still not do it, you are not in a position to accept the clearance!