Source: The wily fox from Aesop's fables who couldn't be trusted

Disclaimer: The spinner in question can be trusted as long as he doesn't have a ball in his hand

Variations: Canny captain, happy hooker

As in: Warne is so wily he could slip one past Grandma Boycott's bat and she wouldn't know whether to say "Eeh by gum" or "Cor blimey"