If you look at the inside of some of the sports jackets/suits, esp. the Zegna ones, they'll say 'Made exclusively for TYRONE'; I've also seen several pieces marked TYRONE in the past, as a house brand. And they all have the little white tags on them. Perhaps I'm just extrapolating a bit too much, but I'm 99.9% positive that's where this stuff comes from.
It's the only retail closeout Daffy's gets all year -- unlike some of the larger stores like Filenes and Loehmann's which often get stuff from Barney's, Wilkes-Bashford, Richards, and even Fred Segal.