Rake land in Middle East, knowing more about it (9)
I believe the answer is:
womaniser
'rake' is the definition.
(I have seen 'A rake' mean 'womaniser' so perhaps 'rake' could also mean 'womaniser')
'land in middle east knowing more about it' is the wordplay.
'land in middle east' becomes 'Oman' (country in the Middle East).
'knowing more' becomes 'wiser' (I can't justify this - if you can you should give a lot more credence to this answer).
'about it' indicates putting letters inside.
'oman' put inside 'wiser' is 'WOMANISER'.
Can you help me to learn more?
(Other definitions for womaniser that I've seen before include "Playboy" , "Ladies' man" , "Lady-killer" , "Casanova" , "Wolf" .)