Comfortable furniture in place over river (7)

I believe the answer is:

settees

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

'comfortable furniture' is the definition.
'settees' can be an answer for 'furniture' (I've seen this before). I am not sure about the 'comfortable' bit.

'place over river' is the wordplay.
'place' becomes 'set' (setting is a kind of placing).
'over' is a charade indicator (letters next to each other) (in a down clue, some letters go over others).
'river' becomes 'tees' (River Tees).
'set'+'tees'='SETTEES'

'in' is the link.

Can you help me to learn more?

(Other definitions for settees that I've seen before include "furniture" , "Long indoor seats" , "Sofas" .)

I've seen this clue in The Guardian.

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