Noble's partner (6)
I believe the answer is:
barnes
'noble's partner' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for barnes that I've seen before include "London district" , "- Wallis, British engineer (WWTwo bouncing bombs)" , "associated with Wallis?" , "Noble partner in US" , "Part of London" .)