US city entered in a huge novel conveyance (7)
I believe the answer is:
haulage
'conveyance' is the definition.
(thesaurus)
'us city entered in a huge novel' is the wordplay.
'us city' becomes 'la'.
'entered in' indicates putting letters inside.
'novel' indicates an anagram.
'a'+'huge'='ahuge'
'ahuge' anagrammed gives 'hauge'.
'la' going inside 'hauge' is 'HAULAGE'.
(Other definitions for haulage that I've seen before include "Transport business" , "Transportation of heavy goods" , "Road transport" , "Commercial transportation of goods" , "Commercial transport of goods" .)