1: Arguments about a couple of arcane taxes (7)
5: Again Italian couple is late (7)
9: Sheep to start wallowing in ease (3)
10: Incomplete raw data lies in largely unexplored regions (4,7)
11: A little sports car, let to harassed Southern belle (8,5)
13: Local bounder flooded field, say, producing fruit (9)
17: Enter names - register only lists beginners (5)
18: Become aware of aircraft manufacturer starting to negotiate (5)
20: Robins knitting done by row (3,6)
22: Clearly notes Earths at a particular compass point (4-5-4)
25: Pretty girl takes part in outdoor cooking? No just toys (6, 5).
27: Age of neo-catastrophe? (3)
28: Prepare the blocks for a run, perhaps (7)
29: Siblings who have orderly habits? (7)