Spot on former partner initially attracting court (5)
I believe the answer is:
exact
'spot on' is the definition.
(spot on means exactly right)
'former partner initially attracting court' is the wordplay.
'former partner' becomes 'ex' (an ex-partner).
'initially' indicates taking the first letters.
'court' becomes 'ct' (abbreviation used in road names).
The first letter of 'attracting' is 'a'.
'ex'+'a'+'ct'='EXACT'
(Other definitions for exact that I've seen before include "Demand and obtain" , "Precise - demand" , "Precise and strictly correct" , "Not approximate; inflict (revenge) on someone" , "totally accurate" .)