Neck seen in this outrageously reversed result (7)
I believe the answer is:
isthmus
'neck' is the definition.
(I've seen this before)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for isthmus that I've seen before include "Such a narrow area" , "Neck of land between two seas" , "This sum for a narrow piece of land" , "Neck of land connecting larger areas" , "Narrow linking piece of land" .)