Finds one is disparaging about (4,4)
I believe the answer is:
runs down
'finds' is the definition.
(I've seen this before)
'one is disparaging about' is the wordplay.
I cannot really see how this works, but
'one' could be 'un' (northern English dialect form of 'one') and 'un' is found in the answer.
This may be the basis of clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for runs down that I've seen before include "searches successfully" , "Speaks ill of" , "Criticises" , "finds" , "what NI county boss does?" .)