Possible Clues:

• On one's back -- position unsuitable for this?
• Opposition from Royal Engineers is over policy
• Opposition to the Galactic Empire, in 'Star Wars'
• Fight on: one's embedded in position
• Rebels rise violently against point of view
• 2010 Muse single which references George Orwell’s 1984
• Stand in as secret is out
• Electrical property represented by the Greek letter omega
• Rebellious group's concerning opinion about current head of state
• Revolutionary sects are in opposition