Incorrect having grown out (5)
I believe the answer is:
wrong
'incorrect' is the definition.
(I know that incorrect can be written as wrong)
'grown out' is the wordplay.
'out' indicates an anagram (out can mean wrong or inaccurate).
'grown' with letters rearranged gives 'WRONG'.
'having' acts as a link.
(Other definitions for wrong that I've seen before include "Erronious" , "Mistaken" , "Treat unjustly" , "Inaccurate" , "Incorrect, illegal or immoral" .)