Wealthy aunt left abruptly to travel around Paris (8)

I believe the answer is:

affluent

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

'wealthy' is the definition.
(synonyms)

I cannot understand how the remainder of the clue works.

(Other definitions for affluent that I've seen before include "Well-to-do, wealthy" , "Wealthy, rich" , "Well-off" , "Well-heeled" , "Well off, having plenty of money" .)

I've seen this clue in The Irish Times.

Want a hint initially instead of a full solution? Install my app