Left a woman on the corner - flat! (5)
I believe the answer is:
'flat' is the definition.
(I know that flat can be written as level)
'left a woman on the corner' is the wordplay.
'left' becomes 'l' (common abbreviation).
'a woman on the corner' becomes 'evel' (I can't explain this - if you can you should give a lot more credence to this answer).
Can you help me to learn more?
(Other definitions for level that I've seen before include "Uniform" , "Absolutely horizontal" , "Neither winning, nor losing" , "Regular" , "Floor; surveying device" .)