"Get me", you say "water" (3)
I believe the answer is:
sea
'water' is the definition.
(the sea is water)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for sea that I've seen before include "The Med, e.g." , "Lesser ocean" , "Expanse of salt water" , "The main" , "Eg, Aral, Ross, Irish" .)