In Risus, regaining lost Cliche Dice is left entirely to common sense. The guidance suggests that it depends on the nature of the conflict where the dice were lost.
I like this, but I think there could be another method that looks more to the Cliche itself for direction.
Feeding a Cliche
To recover lost dice, you must Feed the Cliche.
Consider what fuels this part of your character. If it's a physical Cliche, such as Star Athlete, or Bare-Knuckle Brawler, it may simply require some rest and a bandage. However, the former may be fed just as well with a rousing speech from your coach, and the latter with a swig of whiskey.
Losing points in Breakneck Stunt Driver might require a trip to your garage to refuel. Meanwhile, the Chain Smoking Mechanic (4) may just need a cigarette, and the Womanising Publicity Agent (3) a trip to the nearest singles bar.
The Amoral Cannibal Savage (3) may recover lost dice through more literal feeding, on the bodies of his enemies. The Preacher with a Crossbow (2) may be better off treating the bodies to a proper burial and blessing.