Resolution satisfied ownership of property after it is abandoned (6)
I believe the answer is:
mettle
'resolution' is the definition.
(thesaurus)
'satisfied ownership of property after it is abandoned' is the wordplay.
I cannot quite understand how this works, but
'satisfied' could be 'met' (as in 'met the conditions of his contract') and 'met' is found within the answer.
'it' could be 't' (abbreviation. e.g. in 'tis) and 't' is found in the answer.
This explanation may well be incorrect...
(Other definitions for mettle that I've seen before include "Pluck" , "Fortitude" , "The courage to carry on" , "Temperament; courage" , "Spirit and courage sound like iron, say" .)