Thanks, mathprofrockstar and merenz.
Note to self: beware the hackneyed phrase such as "Ran rings round". I oscillated between this and "outwitted" as the defn. Add my indecision over whether "cops" meant "police", was a container indicator or "cops, finally" led to S, and quite a few synapses were fried trying to work through all the permutations...
I'm glad that I kept plugging away at this one as the endgame was a real tour de force. Hats off to Twin.