Leaves railway behind English writer (8)
I believe the answer is:
greenery
'leaves' is the definition.
(I've seen this before)
'railway behind english writer' is the wordplay.
'railway' becomes 'ry' (abbreviation).
'behind' means one lot of letters go next to another.
'english writer' becomes 'greene' (novelist Graham Greene. I am not sure about the 'english' bit.).
'ry' put after 'greene' is 'GREENERY'.
Can you help me to learn more?
(Other definitions for greenery that I've seen before include "Leaves etc" , "Colourful display" , "Leaves, maybe" , "Verdure" , "Decorative boughs" .)