Common vegetables area produces (10)
I believe the answer is:
greensward
'common' is the definition.
(both can refer to a grassy area)
'vegetables area produces' is the wordplay.
'vegetables' becomes 'greens' (I've seen this before).
'area produces' becomes 'ward' (I can't explain this - if you can you should believe this answer much more).
'greens'+'ward'='GREENSWARD'
Can you help me to learn more?
(Other definitions for greensward that I've seen before include "Lawn" , "Grass covered ground" , "mostly turf" .)