That of the building opposite? (4)

I believe the answer is:

site

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

'that of the' is the definition.
I can't tell whether this defines the answer.

'opposite?' is the wordplay.
'SITE' is hidden in amongst the letters.
But, I am uncertain how the hidden word is indicated.

'building' acts as a link.

Can you help me to learn more?

(Other definitions for site that I've seen before include "Locale" , "Whereabouts" , "Where something is located" , "Somewhere to build, perhaps" , "Location (of building, dig etc)" .)

I've seen this clue in the Evening Standard.

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