Picture a railway in a beautiful setting (7)
I believe the answer is:
scenery
'a beautiful setting' is the definition.
'scenery' can be an answer for 'setting' (thesaurus). I am not sure about the 'a beautiful' bit.
'picture a railway' is the wordplay.
'picture' becomes 'scene' (scene is a kind of picture).
'a railway' becomes 'ry' (abbreviation).
'scene'+'ry'='SCENERY'
'in' is the link.
Can you help me to learn more?
(Other definitions for scenery that I've seen before include "episode" , "Landscape, view" , "On-stage background" , "Items on stage" , "Theatrical background" .)