Possible Clues:

• Bamboozle French banker into taking soup
• One makes it clear that this is how to study a few about a thousand
• Clear meaty soup
• There''s a hundred on the river battle and so up, of course (8)
• That gets a hundred on the river in France, and in the soup - that's clear
• So, up in France that's quite clear.
• It's clear that gets one so up, of course
• It's clear that it must come before 27 down
• Against having what's French and watery (Parisian soup?)
• A clear soup