3d) From edges of arena, run over to catch country musician. (5,7) A-R-N,-O---N-.
17a) Perhaps Prospero's island toured by players (8) C-B---S-. Is it Ca(Bali)st, because I don't know who Prospero is, can anyone tell me. if it is Cabalist, then that will put a (L) in the middle of the second word in 3d making it A-R-N,-O-L-N-.