Painting Loch Ness with monster's eye in it (9)
I believe the answer is:
landscape
'painting' is the definition.
(landscape is a kind of painting)
'loch ness with monster's eye in it' is the wordplay.
'loch' becomes 'l'.
'ness' becomes 'cape' ('cape' can be a synonym of 'ness').
'with' is a charade indicator (letters next to each other).
'monster's eye' becomes 'ands' (I can't explain this - if you can you should believe this answer much more).
'in it' indicates putting letters inside.
'l'+'cape'='lcape'
'lcape' placed around 'ands' is 'LANDSCAPE'.
Can you help me to learn more?
(Other definitions for landscape that I've seen before include "Views" , "Expanse of scenery" , "(Painting of) scenery" , "Artistic work" , "Oil perhaps" .)