Where the rushing water can cut round a bend? (6)
I believe the answer is:
sluice
'where the rushing water' is the definition.
Although both the answer and definition are singular nouns, I can't see how they can define each other.
'cut round a bend?' is the wordplay.
'cut' becomes 'slice' (synonyms).
'round' indicates putting letters inside.
'a bend?' becomes 'U' (a U-bend is a kind of bend - pipe under sink).
'slice' enclosing 'u' is 'SLUICE'.
'can' acts as a link.
Can you help me to learn more?
(Other definitions for sluice that I've seen before include "Water-control gate" , "Floodgate" , "Drench copiously" , "Conduit for a rapid flow of water" , "Sliding gate to control water in stream" .)