Where files are kept concerning matter linked to railway (8)
I believe the answer is:
registry
'where files' is the definition.
'registry' can be an answer for 'files' (thesaurus). I am unsure of the 'where' bit.
'kept concerning matter linked to railway' is the wordplay.
'kept concerning' becomes 're' (I can't explain this - if you can you should believe this answer much more).
'matter' becomes 'gist'.
'linked to' says to put letters next to each other.
'railway' becomes 'ry' (abbreviation for railway).
're'+'gist'+'ry'='REGISTRY'
'are' acts as a link.
Can you help me to learn more?
(Other definitions for registry that I've seen before include "Place of record" , "Office where records are kept" , "Place to keep records" , "record-holder" , "where files may be observed" .)