Acceptable only if a hundred per cent accurate (3,5)
I believe the answer is:
all right
'acceptable' is the definition.
(I've seen this before)
'only if a hundred per cent accurate' is the wordplay.
I cannot quite understand how this works, but
'a' is found in the answer.
'accurate' could be 'right' (associated in meaning) and 'right' is found within the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for all right that I've seen before include "100% agreement" , "Perfect exam performance" , "Fairly well; acceptable" , "Unhurt - very good" , "Acceptable; I concur" .)