Guileless unconfined weirdo making a comeback (5)

I believe the answer is:

naive

I'm a little stuck... Click here to teach me more about this clue!

'guileless' is the definition.
(I've seen this in another clue)

I can't explain the remainder of the clue.

(Other definitions for naive that I've seen before include "Lacking guile" , "Too simple and trusting" , "Inexperienced and guileless" , "Inexperienced or gullible" , "Too trusting and inexperienced" .)

I've seen this clue in The Guardian.

Want a hint initially instead of a full solution? Install my app