Help them out if you can, after all, the Captain could have his hands full dealing with a 300 hour cadet
Hopefully the F/O is flying, with the Captain organising separation!
You politely want to tell them to get out the way! If that means asking them to wait at the holding point, then so be it.
What if the pilot is not a student and operating an aircraft with equal performance to that of the RPT? You're are saying I should wait for an aircraft that is on a 15 (possibly more) mile final?
To revert back to my example, I backtracked, departed and passed over the inbound aircraft at 10 miles, 8500 above them!