Renowned stage close by a railway (9)
I believe the answer is:
legendary
'renowned' is the definition.
(thesaurus)
'stage close by a railway' is the wordplay.
'stage close by' becomes 'legend' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'railway' becomes 'ry' (abbreviation).
'legend'+'a'+'ry'='LEGENDARY'
Can you help me to learn more?
(Other definitions for legendary that I've seen before include "Fabled, celebrated" , "Based on myth or famous for achievements (9)" , "From a fabulous traditional story" , "Well-known" , "Romantic; fabulous" .)