Clean as a whistle, [196]
Clean sweep, [217]
Clear as noonday, [71]
Clear as crystal, [207]
Clockwork, like, [54]
Cloud and a silver lining, [189]
Clover, to be in, [78]
Coach-and-four through Act of Parliament, [148]
Coat does not make gentleman, [139]
Cobbler stick to last, let, [161]