Honesty also seen in court? Not quite (7)
I believe the answer is:
candour
'honesty' is the definition.
(candour is a kind of honesty)
'also seen in court? not quite' is the wordplay.
'also' becomes 'and' (both can mean in addition).
'seen in' is an insertion indicator.
'not quite' means to remove the last letter (most but not all of the word).
'court' with its last letter taken away is 'cour'.
'and' inserted into 'cour' is 'CANDOUR'.
(Other definitions for candour that I've seen before include "Frankness, openness" , "telling it like it is" , "'Frankness, honesty (7)'" , "Forthrightness" , "Opening up" .)