A fortune in zloty (3)
I believe the answer is:
lot
'a fortune' is the definition.
(as in a person's lot in life)
'in zloty' is the wordplay.
'in' indicates the answer is hidden within the clue.
'LOT' is hidden in the letters of 'zloty'.
(Other definitions for lot that I've seen before include "Parcel - collection" , "Abraham's nephew - assigned share" , "biblical refugee" , "is to be knocked down" , "Large amount - parcel of land" .)