…very neglected in corner (4)
I believe the answer is:
cure
'very neglected in corner' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Perhaps you can see an association between them that I don't see?
This is the entire clue.
Can you help me to learn more?
(Other definitions for cure that I've seen before include "Make better or preserve in salt" , "Restorative" , "Heal or preserve" , "Preserve by smoking - make better" , "Restore - kipper" .)