Two-shilling coin (6)
I believe the answer is:
florin
'two-shilling coin' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for florin that I've seen before include "Two bob, in old money" , "Old British (or Dutch) coin" , "ten pence" , "Old two-shilling piece" , "Old 2-shilling piece" .)