Fix waste pipe at the end (6)
I believe the answer is:
scrape
'fix' is the definition.
(thesaurus)
'waste pipe at the end' is the wordplay.
I cannot really understand how this works, but
'waste' could be 'scrap' ('scrap' can be a synonym of 'waste') and 'scrap' is present in the answer.
A single letter 'e' remains which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for scrape that I've seen before include "jar" , "Clear or smooth by grating" , "Awkward situation caused by capers" , "pickle!" , "Grate; graze" .)