Able to live in many places using EU railway to choose mostly (9)

I believe the answer is:

eurytopic

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'able to live in many places' is the definition.
I can't tell whether this definition defines the answer.

'eu railway to choose mostly' is the wordplay.
'railway' becomes 'ry' (abbreviation for railway).
'to choose mostly' becomes 'topic' (I am not sure about this - if you are sure you should believe this answer much more).
'eu'+'ry'+'topic'='EURYTOPIC'

'using' acts as a link.

Can you help me to learn more?

I've seen this clue in The Times.

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