See inside enclosed area cut green? (6)
I believe the answer is:
colour
'green?' is the definition.
(green is a colour)
'see inside enclosed area cut' is the wordplay.
'see' becomes 'lo' (archaic exclamation meaning 'look!').
'inside' indicates putting letters inside.
'enclosed area cut' becomes 'cour' (I can't justify this - if you can you should give a lot more credence to this answer).
'lo' inserted within 'cour' is 'COLOUR'.
Can you help me to learn more?
(Other definitions for colour that I've seen before include "Distort; blush; hue" , "Hue, tint" , "Red or green, say" , "Blue or green, say" , "Influence" .)