Possible Clues:

• Dutch port, the birthplace of Erasmus
• Dutch city and port
• European port's almost completely decayed river embankment
• City scoundrel and US lawyer married
• Swine angry over port
• Port gives mother a bad character, initially
• Major North Sea port — tarred tom (anag)
• Major world seaport at the mouth of the Meuse
• River creature died in charge into port
• Beast swallows another 500 and a large port