Reportedly pushed under water pipe (4)
I believe the answer is:
duct
'pipe' is the definition.
(I've seen this in another clue)
'reportedly pushed under water' is the wordplay.
'reportedly' shows a homophone (sound like).
'pushed under water' becomes 'ducked' (duck can mean to submerge under water).
'ducked' is a homophone of 'DUCT'.
(Other definitions for duct that I've seen before include "Tube for conveing cable, liquid etc" , "Pipe conveying fluid or gas" , "The Eve of St - is a narrative poem by Keats" , "Channel" , "Tube for cables, air, etc" .)