It carries away the waste from a fish cleaner (6)
I believe the answer is:
gutter
'a fish cleaner' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe there's a link between them I don't understand?
'it carries away the waste from' is the wordplay.
I cannot really see how this works, but
'it' could be 't' (abbreviation. e.g. in 'tis) and 't' is found in the answer.
'the' could be 't' (the is pronounced as a 't' sound in some dialects) and 't' is found in the answer.
'from' could be 'e' (I've seen this in other clues) and 'e' is found within the answer.
The remaining letters 'gur' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for gutter that I've seen before include "Street channel for carrying off rainwater" , "Channel for carrying off water" , "Where snipe can be found" , "piping?" , "Channel running along the eaves of a building" .)