Possible Clues:

• Elevated RC service location is hush-hush
• Classified notice put up, sort of 'erect'
• Erect post (anag)
• Protest planned about European Commission is not to be disclosed
• Street cop (anag.)
• Classified as revolutionary church in organised protest
• On a need-to-know basis
• Private sector inept, having dismissed popular reforms
• Upper-level security clearance status
• Design of poster etc is hush-hush