Crossword Genius

Queen from the south supporting what Catullus wrote for sex capital (6)

Ross

I believe the answer is:

vienna

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

'capital' is the definition.
(capital of Austria)

I can't explain the rest of the clue.

Can you help me to learn more?

(Other definitions for vienna that I've seen before include "On the Danube, it was home to many great composers" , "Austrian city of the waltz" , "European capital" , "Wien" , "huge 20 [ULTRAVOX] hit" .)

I've seen this clue in The Independent.
Want a hint initially instead of a full solution? Install my app