1: Certain mollusk back in Hokkaido ports again (9)
2: Shorten a spine with boron injection (7)
3: Athletic practice for period of examination (4,5)
4: Rise as in throw, perhaps, showing fitness to fly (13)
5: Repair stitching that flares Ewok cloaks (5)
6: Usual resort for dads sister after lunch finished (5)
7: Utter poppycock! He was a Dutch painter (5)
9: Drive away roofing material before farmhouse becomes a target area (8,5)
14: Fashionable fragrance, fundamentally (2,7)
15: Crushed bones, say, as source of sauce (4,5)
17: Throws out the pressman returning to play sport (7)
18: 15-across Something good that blinds copper (5,7)
19: Top communicator qualified to produce telegram (5)
20: Course left out of Texas city's comeback (5)