Never-seen-before thing Beth Harmon might do in UK city (9)
I believe the answer is:
newcastle
'city' is the definition.
(Newcastle is an example)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for newcastle that I've seen before include "Man City?" , "port for England" , "City on the Tyne" , "Tyneside city" , "town" .)