Dated old flame before time in court (7)
I believe the answer is:
extinct
'dated' is the definition.
(thesaurus)
'old flame before time in court' is the wordplay.
'old flame' becomes 'ex' (an ex-lover).
'before' says to put letters next to each other.
'time' becomes 't' (abbreviation).
'court' becomes 'ct' (abbreviation used in road names).
'ex'+'t'+'in'+'ct'='EXTINCT'
(Other definitions for extinct that I've seen before include "gone for ever" , "Defunct" , "Of volcano, no longer active" , "Having died out, animal species or volcano" , "Like a dodo" .)