You, I hear, went inside sore, returning money (5)
I believe the answer is:
euros
'money' is the definition.
(I know that Euros is a Currency)
'you i hear went inside sore returning' is the wordplay.
I cannot really see how this works, but
'you' could be 'u' (commonly used in online communication) and 'u' is found in the answer.
an anagram of 'sore' is 'eros' which is present in the remaining letters.
No letters remain.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for euros that I've seen before include "Monetary units" , "Common currency" , "French coins and notes" , "Continental coins" , "Continental currency units" .)