Sucker's money? (5)
I believe the answer is:
lolly
I believe this is a double definition.
'sucker's' is the first definition.
(I've seen this in another clue)
'money?' is the second definition.
(I know that lolly is a type of money)
(Other definitions for lolly that I've seen before include "sticky sweet" , "Money (which can be licked?)" , "Boiled sweet" , "Sweet, money (colloq.)" , "Moolah" .)