Genuine; exact (4)
I believe the answer is:
true
This clue is a double definition.
'genuine' is the first definition.
(I know that genuine can be written as true)
'exact' is the second definition.
(I've seen this in another clue)
(Other definitions for true that I've seen before include "Unfeigned" , "Honest - expression of agreement" , "Exact; faithful" , "Exact, factual" , "Genuine, real" .)