The most common and most likely answer to this crossword clue is the 10 letter word FINANCIERS
I've seen this crossword clue in The Daily Telegraph
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More clues leading to the result FINANCIERS
Buddy explains!
The straight part
We know that "City men" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case city men = financiers.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does FINANCIERS mean?
FINANCIERS noun- A person who, as a profession, profits from large financial transactions.
- A company that does the same.
- One charged with the administration of finance; an officer who administers the public revenue; a treasurer.
- A light, spongy teacake, usually based on almond flour or flavoring.
- A traditional French (Ragoût a la Financière) or Piemontese (Finanziera alla piemontese) rich sauce or ragout, made with coxcomb, wattles, cock's testicles, chicken livers and a variety of other ingredients.