Eleventh sign of the zodiac; the Water Carrier (8)
I believe the answer is:
aquarius
I believe this is a double definition.
'eleventh sign of the zodiac' is the first definition.
(I've seen this before)
'the water carrier' is the second definition.
(thesaurus)
(Other definitions for aquarius that I've seen before include "Star sign" , "The Water-carrier, 11th sign of the Zodiac" , "Sign of the Water-carrier - one of 12 Across" , "The Water Bearer" , "A 23 ac" .)