Where one sees drainpipes disregarding rules (5,3,4)
I believe the answer is:
below the belt
'drainpipes disregarding rules' is the definition.
I don't know anything about this answer so I cannot tell whether this works.
'where one' is the wordplay.
I cannot really see how this works, but
'one' could be 'the' (both can introduce a definite example of something) and 'the' is present in the answer.
This may be the basis of clue (or it may be nonsense).
'sees' is the link.
Can you help me to learn more?
(Other definitions for below the belt that I've seen before include "Illegal" , "Hang scabbard here" , "In an unscrupulous or cowardly way" , "Not fair" , "fly is here" .)