Clue: First part of Julius Caesar, for example, as opposed to 21 down (5)
Answer: NOMEN
Explanation: Definition: First part of Julius Caesar, for example
The opposite of YES-MEN. As well as just meaning "name" in Latin, *nomen* had the more specific meaning of a family name. See here for more details. In Gaius Julius Caeser, to give him his full name, Gaius is the *praenomen*, Julius the *nomen* and Caesar the *cognomen*. Here endeth the Latin lesson.