Genuine currency (8)
I believe the answer is:
sterling
I believe this clue is a double definition.
'genuine' is the first definition.
(thesaurus)
'currency' is the second definition.
(I know that sterling is a type of money)
(Other definitions for sterling that I've seen before include "Ringlets being of solid worth" , "Excellent, first-class" , "Of solid worth, like British money" , "Genuine - money" , "banking standard" .)