Save record held by court introduced by former partner (6)
I believe the answer is:
except
'save' is the definition.
(I've seen this before)
'record held by court introduced by former partner' is the wordplay.
'record' becomes 'EP' (abbreviation for extended play record).
'held by' indicates putting letters inside.
'court' becomes 'ct' (abbreviation used in road names).
'introduced by' is a charade indicator (letters next to each other).
'former partner' becomes 'ex' (an ex-partner).
'ep' going within 'ct' is 'cept'.
'cept' put after 'ex' is 'EXCEPT'.
(Other definitions for except that I've seen before include "Leave out, exclude" , "Not including, omit this" , "Apart from, excluding" , "Other than - saving" , "Make a point of not including" .)