Piece of agricultural land with small WC? (6)
I believe the answer is:
fields
'piece of agricultural' is the definition.
I can't judge whether this defines the answer.
'land with small wc?' is the wordplay.
'land' becomes 'field' (field is a kind of land).
'with' is a charade indicator (letters next to each other).
'small wc?' becomes 's' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'field'+'s'='FIELDS'
Can you help me to learn more?
(Other definitions for fields that I've seen before include "Enclosed pieces of land" , "Areas of farmland" , "See 25 Down" , "Cleared areas of land" , "Deals with" .)