Water on demand initially can keep you dry (4)
I believe the answer is:
hood
'keep you dry' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'water on demand initially' is the wordplay.
'water' becomes 'hoo' (I can't justify this - if you can you should believe this answer much more).
'on' says to put letters next to each other.
'initially' says to take the initial letters.
The first letter of 'demand' is 'd'.
'hoo'+'d'='HOOD'
'can' is the link.
Can you help me to learn more?
(Other definitions for hood that I've seen before include "Head covering or American car bonnet" , "Head covering of an American gangster" , "Bonnet (US) - gangster (US)" , "A cover; Bismarck sank it, 1941" , "Outlaw and gangster" .)