Yes, it’s Danube.
Water carrier bathes Aida, Nubian Princess whose eye has succumbed to the east. (6)
WORDPLAY
bathes [hidden word container]
Aida, Nubian Princess -> daNubi
eye [charade] i
succumbed [substitution indicator]
to the East [abbr] e
DaNube (i substituted by e)
WHOLE DEFINITION
water carrier = Danube
Over to you, twyngwyn.
