Deed shown in a court (3)
I believe the answer is:
act
'deed' is the definition.
(an action)
'a court' is the wordplay.
'court' becomes 'ct' (abbreviation used in road names).
'a'+'ct'='ACT'
'shown in' acts as a link.
(Other definitions for act that I've seen before include "Take steps" , "Pretend to be - deed" , "Feign" , "Perform theatrically" , "Do something, in a play?" .)