Second liver prepared for cash (6)
I believe the answer is:
silver
'for cash' is the definition.
(thesaurus)
'second liver prepared' is the wordplay.
'second' becomes 's' (common abbreviation).
'prepared' indicates an anagram.
'liver' anagrammed gives 'ilver'.
's'+'ilver'='SILVER'
(Other definitions for silver that I've seen before include "Argent" , "Medal for the runner-up" , "Movies" , "Mineral ore, chemical symbol Ag" , "See 1" .)