To clean someon'e clock can mean to beat someone so badly that it is embarrassing. So, I would interpret this sentence as "I would hate to beat you so badly in the primaries that it would be embarrassing for you."Thanks for your replies!
So if I read:
"I'd hate to have to clean your clock in the primaries" does it mean that "I don't want you to win the primaries"?
HERE in OE there is an interesting thread about 'clean your clock'.clean someone's clock = beat, thrash, or defeat someone decisively.
I would like to translate: That dude is much bigger than you and could easily clean your clock.
Quel tizio é più grande di te e potrebbe facilmente batterti/picchiarti/sconfiggerti.