What is green in river bank? (6)
I believe the answer is:
drawee
'river bank?' is the definition.
'drawee' can be an answer for 'bank?' (as in something from which money is drawn). I'm not certain of the 'river' bit.
'what is green in' is the wordplay.
'what' becomes 'dee' (I can't explain this - if you can you should believe this answer much more).
'is green' becomes 'raw' ('raw' can be a synonym of 'green').
'in' means one lot of letters goes inside another.
'dee' going around 'raw' is 'DRAWEE'.
Can you help me to learn more?
(Another definition for drawee that I've seen is " bank?".)