Lady to dine out (4)
I believe the answer is:
enid
'lady' is the definition.
(I've seen this before)
'dine out' is the wordplay.
'out' is an anagram indicator (out can mean wrong or inaccurate).
'dine' with letters rearranged gives 'ENID'.
'to' acts as a link.
(Other definitions for enid that I've seen before include "Lady" , "Woman" , "Writer of children's books, d. 1968" , "'... Blyton, children's author (4)'" , "Arthurian wife" .)