Former Spanish currency (6)
I believe the answer is:
peseta
'former spanish currency' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for peseta that I've seen before include "Old bit" , "Old unit of money in Spain" , "Old money - see Pat (anag)" , "Pre-euro money unit in Spain" , "Old bread" .)