Retail events when prices are reduced

Airport screening organization: Abbr.3 Blue-green shade (anagram of "late")4 Building material for castles on the beach4 "___ & Demons," 2009 film starring Tom Hanks that's a sequel to 43d, centered on following a trail of ancient cryptic codes6 Morning hours: Abbr.3 Joan of ___3 Cow's "hello"3