Nobody makes better cards than USPCC in my onion - and Tally Ho is the same paper stock as any other Bike deck - clumping comes from humidity, heat and sweat and dirt. Always wash your hands with soap and water before handling your cards. Don't drop them on the floor or street. and store your cards in a cool dry place. (especially if you live in a humid climate like New Orleans, Louisiana and Florida)
If you notice clumping you can try fanning powder, or springing them a few times, or laying them out separate and letting them dry out, but the truth is cards are not meant to last forever.
Clumping cards? Toss it and buy another one. But no ... for the most part you should not experience Clumping with the Tally Ho design