Crossword Genius

Only cab taken around the circle (7)

Ross

I believe the answer is:

balcony

I'm a little stuck... Click here to teach me more about this clue!

'the circle' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe there's an association between them I don't understand?

'only cab taken' is the wordplay.
'only cab' anagrams to 'BALCONY'.
Though, I am not sure how this is indicated.

'around' is the link.

Can you help me to learn more?

(Other definitions for balcony that I've seen before include "scene in Romeo and Juliet?" , "Seats from which to view" , "Projecting platform with railings" , "Open projecting part of upper floor" , "Upper tier of seats in theatre" .)

I've seen this clue in The Irish Independent.
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