Serbian trains working for this railway? (5-8)

I believe the answer is:

trans-siberian

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'this railway?' is the definition.
I know nothing about this answer so I can't tell whether it can be defined by this definition.

'serbian trains working' is the wordplay.
'working' indicates an anagram.
'serbian'+'trains'='serbiantrains'
'serbiantrains' is an anagram of 'TRANS-SIBERIAN'.

'for' acts as a link.

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