3 down: Place in aviary holds our egg (9)
This was the last clue I got, and no wonder – the use of “egg” as a synonym for “encourage” as the direct clue is drawing a very, very long bow.
5 down: I can’t tell you if tanks crash into stadium (3’1, 3, 2)
Not so much bullshit as an uncharacteristically inelegant clue. “Dome” as stadium, “I can’t tell you” as the direct clue… it’s a bit of an NS clue, really. We expect better from the master!