Many have been spent in Spain (7)
I believe the answer is:
pesetas
'many have been spent' is the definition.
I can't tell whether this definition defines the answer.
'spain' is the wordplay.
I cannot quite see how this works, but
'spain' could be 'es' (es is an abbreviation for Spain) and 'es' is present in the answer.
This may be the basis of the clue (or it may be nonsense).
'in' acts as a link.
Can you help me to learn more?
(Other definitions for pesetas that I've seen before include "Old Spanish money" , "Old units of Spanish currency before euros" , "Spanish bread no longer used" , "Former currency of Spain" , "old bread" .)