Photographed out of doors? (7)

I believe the answer is:

exposed

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'photographed' is the definition.
The answer and definition can be both to do with communicating as well as being past participle verbs.
Maybe there's a link between them I don't understand?

'out of doors?' is the wordplay.
'out of' becomes 'ex' ('out of' in Latin).
'doors?' becomes 'posed' (I can't justify this - if you can you should believe this answer much more).
'ex'+'posed'='EXPOSED'

Can you help me to learn more?

(Other definitions for exposed that I've seen before include "in the nude" , "at mercy of weather" , "Showed up" , "Deprived of cover" , "Unmasked, revealed" .)

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

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