If it should occur in the court hearing (2,4)
I believe the answer is:
in case
'should occur in the court hearing' is the definition.
I can't judge whether this definition defines the answer.
'if it' is the wordplay.
'if' becomes 'incas' (I am not sure about this - if you are sure you should believe this answer much more).
'it' becomes 'e' ('e' can mean 'electronic' which is similar to 'IT').
'incas'+'e'='IN CASE'
Can you help me to learn more?
(Other definitions for in case that I've seen before include "As a precaution" , "for emergency" , "Packed" , "For fear that" , "Where traveller may keep clothes" .)