Short shock succeeded in part of London (6)

I believe the answer is:

barnes

I'm a little stuck... Click here to teach me more about this clue!

'part of london' is the definition.
(I've seen this before)

I cannot understand how the remainder of the clue works.

(Other definitions for barnes that I've seen before include "Part of London" , "Sir - Wallis, World War Two bouncing bomb inventor" , "- Wallis, British engineer (WWTwo bouncing bombs)" , "Noble partner in US" , "associated with Wallis?" .)

I've seen this clue in The Telegraph.

Want a hint initially instead of a full solution? Install my app