There's money in type of pop music? (4)
I believe the answer is:
euro
'money in type of pop music?' is the definition.
'euro' can be an answer for 'money' (currency of the Eurozone). I am not sure about the 'in type of pop music?' bit.
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for euro that I've seen before include "The Vatican's currency" , "Currency of Finland" , "European currency" , "Currency of Germany" , "Continental currency" .)