Popular transport hub includes everything fitting (12)

I believe the answer is:

installation

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'fitting' is the definition.
(thesaurus)

'popular transport hub includes everything' is the wordplay.
'popular' becomes 'in' ('in' can mean trendy).
'transport hub' becomes 'station' (I can't justify this - if you can you should give a lot more credence to this answer).
'includes' is an insertion indicator.
'everything' becomes 'all' (all things).
'station' going around 'all' is 'stallation'.
'in'+'stallation'='INSTALLATION'

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(Other definitions for installation that I've seen before include "Positioning" , "Art exhibit in gallery" , "Exhibit constructed in a gallery" , "The making of equipment ready for use" , "Large gallery artwork" .)

I've seen this clue in The Times.

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