It refers to what we own to in court (3)
I believe the answer is:
our
'it refers to what we own' is the definition.
I know nothing about this answer so I cannot tell whether it can be defined by this definition.
'in court' is the wordplay.
'in' indicates the answer is hidden within the clue.
'OUR' can be found hidden inside 'court'.
'to' acts as a link.
Can you help me to learn more?
(Other definitions for our that I've seen before include "''Now is the winter of ... discontent'' (Richard III)" , "'-- House' (Madness song)" , "Belonging to us" , "Yours and mine" , "Relating to us" .)