Unpleasant place is ditch (4)
I believe the answer is:
dump
This clue might be a double definition.
'unpleasant place' is the first definition.
'dump' can be an answer for 'place' (I have seen 'Rubbishy place' mean 'dump' so perhaps 'place' could also mean 'dump'). I am unsure of the 'unpleasant' bit.
'is ditch' is the second definition.
(I've seen this before)
Can you help me to learn more?
(Other definitions for dump that I've seen before include "Get rid of" , "Place for unwanted things" , "Jettison; (rubbish) tip" , "Rubbishy place" , "Offload" .)