Bleak desert in which bit of corn planted (6)
I believe the answer is:
dreary
'bleak desert in which bit of corn planted' is the definition.
'dreary' can be an answer for 'bleak' (I've seen this in another clue). I am not sure about the rest of the definition.
'bleak desert in which bit of corn' is the wordplay.
'bleak desert' becomes 'dry' (I can't explain this - if you can you should believe this answer much more).
'in which' is an insertion indicator.
'bit of corn' becomes 'ear' ('ear' is part of 'corn').
'dry' enclosing 'ear' is 'DREARY'.
Can you help me to learn more?
(Other definitions for dreary that I've seen before include "Dark" , "Cheerless and depressing" , "routine" , "avoiding exciting stuff" , "Depressingly dull" .)