Couch in terms of antitheses (4)

I believe the answer is:

sofa

'couch' is the definition.
('sofa' can be a synonym of 'couch')

'in terms of antitheses' is the wordplay.
'in' indicates a hidden word.
'SOFA' is hidden within 'terms of antitheses'.

(Other definitions for sofa that I've seen before include "Chesterfield, maybe" , "Oafs (anag.)" , "Lounge" , "Comfy piece of furniture" , "Area for sitting" .)

I've seen this clue in The Telegraph.

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