Fruit plantation in old farm close to railway (8)
I believe the answer is:
orangery
'fruit plantation' is the definition.
(plantation for growing oranges)
'old farm close to railway' is the wordplay.
'old farm close' becomes 'orange' (I can't justify this - if you can you should give a lot more credence to this answer).
'to railway' becomes 'ry' (abbreviation for railway).
'orange'+'ry'='ORANGERY'
'in' is the link.
(Other definitions for orangery that I've seen before include "cultivated area" , "Building for growing fruit from warmer climes" , "Greenhouse full of citrus trees" , "tree house?" , "Building for citrus growing" .)