Roman commander having a vice we hear? (7)

I believe the answer is:

agrippa

I'm a little stuck... Click here to teach me more about this clue!

'roman' is the definition.
(I have seen 'Powerful Roman' mean 'agrippa' so perhaps 'roman' could also mean 'agrippa')

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for agrippa that I've seen before include "Acts reported of this king" , "one of the Herods" , "Marcus --, Roman general, statesman and architect" , "General who beat Mark Antony at Actium" , "Powerful Roman" .)

I've seen this clue in The Times.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.