Open document (8)
I believe the answer is:
manifest
This clue is a double definition.
'open' is the first definition.
(thesaurus)
'document' is the second definition.
(manifest is a kind of document)
(Other definitions for manifest that I've seen before include "Express" , "Cargo list - it's quite clear" , "Document listing a ship's contents for customs purposes" , "show" , "Conspicuous; cargo list" .)