Wishes to dispose of one house advertised as such
I believe the answer is:
des res
'house advertised as such' is the definition.
I don't know anything about this answer so I can't judge whether this works.
'wishes to dispose of one' is the wordplay.
'wishes' becomes 'desires' (desiring is a kind of wishing).
'to dispose of' indicates named letters should be taken away.
'one' becomes 'i' (Roman numeral).
'desires' with 'i' removed is 'DES-RES'.
Can you help me to learn more?
(Other definitions for des res that I've seen before include "Lovely home" , "Appealing property for sale" , "attractive property" , "A very nice building to live in, in short" , "Desirable residence (abbrev.)" .)