I've just attached the fob/clip to the buckle and simply tucked it into the band of the kilt, between my shirt and the kilt. It always seem to hold it just fine and even if it does slip, it can't go far because it's attached to the buckle. Of course, I've got a bit of a gut so that helps as well...

But I still prefer to wear a vest when I've got a pocket watch....

Make sense?

T.

Edit to add: you can have one of the custom leather folks make you something like is shown here;

http://irishkiltstore.com/sr_aewil_4...sh:id=fxZDyja8

Just make the belt loop larger for a kilt belt or whatever you wear.