A Roman road and railway used by fliers (6)

I believe the answer is:

aviary

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'a roman road and railway used by fliers' is the definition.
I can't judge whether this defines the answer.

'a roman road and railway used by' is the wordplay.
'roman road' becomes 'via' (I've seen this before).
'and' is a charade indicator (letters next to each other).
'railway' becomes 'ry' (abbreviation).
'used by' says to put letters next to each other.
'a'+'via'+'ry'='AVIARY'

Can you help me to learn more?

(Other definitions for aviary that I've seen before include "Bird-house" , "Bird enclosure" , "Its inhabitants probably like flying" , "wildlife centre" , "Large bird cage" .)

I've seen this clue in the Evening Standard.

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