They open out for novice (8)
I believe the answer is:
neophyte
'for novice' is the definition.
(neophyte is a kind of novice)
'they open out' is the wordplay.
'out' indicates anagramming the letters (out can mean wrong or inaccurate).
'they'+'open'='theyopen'
'theyopen' anagrammed gives 'NEOPHYTE'.
(Other definitions for neophyte that I've seen before include "Pet honey for a religious novice" , "Initiate" , "raw recruit" , "Newcomer, starter" , "One's just taken orders" .)