its the actual phraseology of that clearance call that I'm unsure of.
I would say -
"Bankstown Ground, Cessna XXX taxiing VFR for "destination", 2 POB, request airways clerance, received alpha".
That tells them where you want to go and that you want an airways clearance. That will get them hunting for your flight plan in the system. I wouldn't worry about the runway you are taxi-ing to as that is covered in ATIS and you are saying you have received ATIS.