Sign of the water-carriers (8)
I believe the answer is:
aquarius
'sign of the water-carriers' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for aquarius that I've seen before include "Eleventh sign of the Zodiac" , "A 23 ac" , "Sign of the water-carriers" , "The Water Bearer" , "The Water-carrier, 11th sign of the Zodiac" .)