11 Across(5)- castles in the air R_ _ _ _
20 Across (5) sounds like one had a stab at this invitee _ _ E_ T
13 Down (5) Get to grips with this piece of foliage S_ _ _ _
12 Down (6,5) But in public does the spy appear as a lady? _ _ _R_ _ A_ _ _ _
Any help would be appreciated!
Thanks,
Jellybean