Across
1Path a planet keeps (5) (5)
4Of our own star (5) (5)
7The one at the centre of it all (3) (3)
9Where all of this is happening (3) (3)
12Sphere — and a word for any world (3) (3)
13Curve a comet cuts across the night (3) (3)
16Bag, or a boxer's winnings (5) (5)
17Sortie, or a witty retort (5) (5)
Down
1Green relief in the desert (5) (5)
3Sharp to the taste, or a small pie (4) (4)
5Waterfall, in Scotland (3) (3)
10Untruth, or how the ball sits (3) (3)
11What the sun leaves behind (3) (3)
13What we breathe, or a tune (3) (3)
14American car, or to harry (5) (5)
15Where you go to be pummelled (4) (4)
Away
1Greek mountain piled on Pelion (4) (4)
2Inlet, or what the hound does (3) (3)
3Directed at an end, in grammar (5) (5)
4Arrangement, or a stitch-up (5) (5)
5One who is smitten (5) (5)
6Medieval overseer of a manor (5) (5)
7Tracks on an album (5) (5)
8Do as you are told (4) (4)
12It comes before the lamp is lit (3) (3)