Redesigned quad with cute water channel (8)
I believe the answer is:
aqueduct
'water channel' is the definition.
'redesigned quad with cute' is the wordplay.
'redesigned' is an anagram indicator.
'with' is a charade indicator (letters next to each other).
'quad' put after 'cute' is 'cutequad'.
'cutequad' anagrammed gives 'AQUEDUCT'.
(Other definitions for aqueduct that I've seen before include "Waterway" , "Water-carrying bridge" , "Raised water conduit" , "High water channel" , "Conduit to carry water over a valley" .)