Crowd in Fleet Street? (5)
I believe the answer is:
press
I believe this is a double definition.
'crowd' is the first definition.
(press is a kind of crowd)
'fleet street?' is the second definition.
(thesaurus)
'in' is the link.
(Other definitions for press that I've seen before include "Newspaper industry" , "Reporters" , "Urgency" , "Smooth" , "Petition earnestly" .)