Crossword Genius

At university, in charge about money (5)

Ross

I believe the answer is:

ducat

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

'money' is the definition.
(I know that ducat is a currency)

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for ducat that I've seen before include "Historical coin" , "tender once" , "Antique coin" , "piece of gold" , "Money no longer" .)

I've seen this clue in the Sydney Morning Herald.
Want a hint initially instead of a full solution? Install my app