Extraordinary interest in American panel, after judge quits (5)
I believe the answer is:
usury
'extraordinary interest' is the definition.
'usury' can be an answer for 'interest' (usury is a kind of interest). I am not sure about the 'extraordinary' bit.
'american panel after judge quits' is the wordplay.
I cannot quite understand how this works, but
'american' could be 'us' (abbreviation for United States) and 'us' is present in the answer.
This may be the basis of clue (or it may be nonsense).
'in' is the link.
Can you help me to learn more?
(Other definitions for usury that I've seen before include "Demanding excessive interest" , "Too much interest" , "Shylock's calling" , "High-interest lending" , "Loaning money at high interest" .)