Owner of bark in films sails out east (6)
I believe the answer is:
lassie
'owner of bark in films' is the definition.
(fictional dog in several films)
'sails out east' is the wordplay.
'out' is an anagram indicator (out can mean wrong or inaccurate).
'east' becomes 'e' ('E' can be a synonym of 'east'**).
'sails' is an anagram of 'lassi'.
'lassi'+'e'='LASSIE'
(Other definitions for lassie that I've seen before include "Girl from Scotland and dog from film" , "Young Scottish girl or Hollywood lost dog" , "Movie role for several dog stars" , "TV/film dog" , "dog in pictures" .)