Circa (about)?
Bit of a struggle justifying it. "irc" is one racing car(!), "after third raCe" makes "circ", but where's the "a"? If it's "after", then there's no longer a position indicator to move the "Irc" to after the "C"

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After we were married, Mrs Worrier made me a millionaire. Trouble is I used to be a billionaire.