Something afoot in the capital (10)
I believe the answer is:
wellington
I believe this is a double definition.
'something afoot' is the first definition.
(Wellington boots are worn on the feet)
'capital' is the second definition.
(Wellington is an example)
'in the' acts as a link.
(Other definitions for wellington that I've seen before include "made to splash through the wet" , "Kind of boot" , "Former PM" , "Victor at Waterloo" , "Footwear" .)