Wet area in planet low in some bananas (9)
I believe the answer is:
marshland
'wet area' is the definition.
'marshland' can be an answer for 'area' (I have seen 'Boggy area ' mean 'marshland' so perhaps 'area' could also mean 'marshland'). I am not sure about the 'wet' bit.
'planet low in some bananas' is the wordplay.
'planet' becomes 'mars' (Mars is a planet).
'low' becomes 'l' (I can't justify this - if you can you should give a lot more credence to this answer).
'in' indicates putting letters inside.
'some bananas' becomes 'hand' (I've seen this before).
'l' going inside 'hand' is 'hland'.
'mars'+'hland'='MARSHLAND'
'in' acts as a link.
Can you help me to learn more?
(Other definitions for marshland that I've seen before include "Boggy territory" , "Boggy terrain" , "Waterlogged area" , "damp patch" , "Boggy area" .)