No longer with us, former partner can court (7)
I believe the answer is:
extinct
'no longer with us' is the definition.
(extinct means no longer existing)
'former partner can court' is the wordplay.
'former partner' becomes 'ex' (an ex-partner).
'can' becomes 'tin' (both are metal containers).
'court' becomes 'ct' (abbreviation used in road names).
'ex'+'tin'+'ct'='EXTINCT'
(Other definitions for extinct that I've seen before include "Ended" , "No longer living, like dinosaur" , "Dead - obsolete - extinguished" , "No linger in existence" , "No longer erupting" .)