Court risk associated with railway (8)
I believe the answer is:
chancery
'court' is the definition.
(chancery is a kind of court)
'risk associated with railway' is the wordplay.
'risk' becomes 'chance' (synonyms).
'associated with' says to put letters next to each other.
'railway' becomes 'ry' (abbreviation for railway).
'chance'+'ry'='CHANCERY'
(Other definitions for chancery that I've seen before include "Where Jarndyce suit languished" , "Lord Chancellor's court" , "He can cry (anag.)" , "Division of the High Court of Justice" , "Division of the British Court of Justice" .)