Readies (4)
(Other definitions for cash that I've seen before include "Ready money" , "Funds" , "Till" , ""Readies"" , "Hard currency" .)
(Other definitions for rhino that I've seen before include "Large animal (abbr) - money (slang)" , "Animal hunted for its horn" , "African/Asian ungulate" , "Endangered species of large horned herbivore" , "Horned jungle beast" .)