Bloke going round city returned with US lawyer to make notes (9)
I believe the answer is:
memoranda
'notes' is the definition.
(more than one memorandum)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for memoranda that I've seen before include "Records" , "Communications" , "Written messages or notes" , "Notes recorded for future use" , "official minutes" .)