Money for an ice cream (5)
I believe the answer is:
lolly
I believe this is a double definition.
'money' is the first definition.
(I've seen this before)
'for an ice cream' is the second definition.
(an ice lolly might be made of ice cream)
(Other definitions for lolly that I've seen before include "Sweet, money (colloq.)" , "dough" , "Money (which can be licked?)" , "Money; sweet on a stick" , "A sucker" .)