Help for the poor old woman with parking - an outstanding plan (6,3)
I believe the answer is:
relief map
'an outstanding plan' is the definition.
'relief map' can be an answer for 'plan' (I've seen this before). I'm not sure about the 'an outstanding' bit.
'help for the poor old woman with parking' is the wordplay.
I cannot quite see how this works, but
'help' could be 'relief' (relief is a kind of help) and 'relief' is located in the answer.
'parking' could be 'p' (abbreviation on road signs) and 'p' is found in the answer.
'old woman' could be 'ma' (both can mean someone's mother) and 'ma' is present in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for relief map that I've seen before include "Plan with contours" , "Street plan" , "It shows high and low points" , "I exhibit ups and downs" , "Geographical chart" .)