Approximately in Latin (5)

I believe the answer is:

circa

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

'approximately' is the definition.
(I've seen this in another clue)

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

Can you help me to learn more?

(Other definitions for circa that I've seen before include "Preceding a date, this means about" , "Costa del Sol city" , "More or less" , "About (regarding dates)" , "Approximately (Latin)" .)

I've seen this clue in The Mirror.

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.