Prophet with small house disappearing in water (3)
I believe the answer is:
sea
'water' is the definition.
(the sea is water)
'prophet with small house disappearing' is the wordplay.
I cannot really understand how this works, but
'small' could be 's' (abbreviation - e.g. clothes size) and 's' is found in the answer.
The remaining letters 'ea' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
'in' acts as a link.
(Other definitions for sea that I've seen before include "70% of the earth's surface" , "Lesser ocean" , "Large body of salt water" , "The Med, e.g." , "The tide" .)