Additional passage from book court rejected (5)
I believe the answer is:
extra
'additional' is the definition.
(extra means additional or surplus)
'passage from book court rejected' is the wordplay.
I cannot really understand how this works, but
'from' could be 'ex' ('from' in Latin) and 'ex' is present in the answer.
The remaining letters 'tra' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for extra that I've seen before include "Unnecessary" , "particularly" , "person in shot?" , "Minor actor in crowd scenes" , "Not a hit certainly" .)