Characterless bread that is outside (5)
I believe the answer is:
inane
'characterless' is the definition.
(thesaurus)
'bread that is outside' is the wordplay.
'bread' becomes 'nan' (variant spelling of naan).
'that is' becomes 'ie' ('i.e.' can be a synonym of 'that is').
'outside' indicates putting letters inside.
'nan' placed inside 'ie' is 'INANE'.
(Other definitions for inane that I've seen before include "Annie (anag.)" , "unimaginative" , "Frivolous" , "Foolish, fatuous" , "Lacking meaning" .)