Challenge to read out (4)
I believe the answer is:
dare
'challenge' is the definition.
(I know that dare is a type of challenge)
'read out' is the wordplay.
'out' indicates an anagram (out can mean wrong or inaccurate).
'read' with letters rearranged gives 'DARE'.
'to' acts as a link.
(Other definitions for dare that I've seen before include "Have the courage to try something" , "Challenge to do something foolhardy" , "Take a chance - read about it" , "Venture, have courage" , "Be courageous enough to try or do" .)