Related Clues:

• Animal retreat
• Surprise party cry
• Conceal British identity somewhat
• Play a game of Sardines, say
• Covered structure from which to observe birds
• Said to be a conflicted character's mask
• Dig yourself into a hole, say?
• What stowaways do
• 'Don't let them find us!'
• Cry just before the guest of honor arrives at a surprise party
• Fur mask
• Don't show skin
• Took out someone a bit past it
• Pigskin, e.g
• Prep for a surprise party, in a way