Innocent abroad? (4)

I believe the answer is:

naif

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

This clue might be a double definition.

'innocent' is the first definition.
(I know that naif is a type of innocent)

'abroad?' is the second definition.
Both the definition and answer are adjectives. Perhaps there's a link between them I don't understand?

Can you help me to learn more?

(Other definitions for naif that I've seen before include "Innocent" , "wide-eyed" , "somewhat ingenuous" , "Artless" , "Unsophisticated" .)

I've seen this clue in The Telegraph, The Globe and Mail and The Guardian.

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