Nothing outstanding, no ring, no spouse! (5)
I believe the answer is:
unwed
'no spouse' is the definition.
(unwed describes an unmarried person)
'nothing outstanding no ring' is the wordplay.
'nothing outstanding' becomes 'unowed' (outstanding describes an unpaid debt).
'no' suggests deleting specific letters.
'ring' becomes 'o'.
'unowed' with 'o' removed is 'UNWED'.
(Other definitions for unwed that I've seen before include "Single" , "Not married" , "Divorced" , "Without benefit of clergy?" .)