Elves sent her out anyway (12)
I believe the answer is:
nevertheless
'anyway' is the definition.
(thesaurus)
'elves sent her out' is the wordplay.
'out' indicates an anagram (out can mean wrong or inaccurate).
'elves'+'sent'+'her'='elvessenther'
'elvessenther' with letters rearranged gives 'NEVERTHELESS'.
(Other definitions for nevertheless that I've seen before include "But always" , "Still" , "However" , "In spite of everything" , "anyhow" .)