Where to find piped water for the most part (2,3,4)
I believe the answer is:
in the main
'for the most part' is the definition.
(I've seen this before)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for in the main that I've seen before include "nautically?" , "mostly" , "Where ships are" , "Almost entirely" , "Where those who walked the plank finished" .)