A waterspout carved in the form of a grotesque face or creature (8)
I believe the answer is:
gargoyle
(Other definitions for gargoyle that I've seen before include "Grotesque gutter spout from glory age" , "Ancient gutter-spout from glory age" , "It drains off water" , "Grotesque architectural statue" , "Medieval gutter spout made of sculpted grotesque figure" .)