Lady Macbeth's problem (4)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
'lady macbeth's problem' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for spot that I've seen before include "Pickle" , "Catch sight of mark in pots" , "See; location" , "Predicament" , "See 5" .)