Sun Tel GK 30/10/05 I hope someone can help. The clue is: A vivarium for a subphylum of arthropods. If I've got the other clues right it is an 11-letter word as follows: _N_E_T_R_R_
CLUE: Geometric vertices A_ _C_S (6 letters)
Everybody (mus.) 5 letters _U_T_
Who is Dido in Cutting It BBC1 Tuesdays?