Start flushing poo that sullied walkway (8)
I believe the answer is:
footpath
This clue might be a double definition.
'start flushing poo that sullied' is the first definition.
Although both the answer and definition are singular nouns, I cannot understand how one could define the other.
'walkway' is the second definition.
(thesaurus)
Can you help me to learn more?
(Other definitions for footpath that I've seen before include "It's at the side of the road for pedestrians" , "cross-country route" , "Countryside route" , "Walker's track, pavement" , "Track for pedestrians" .)