| PURPLEHEART | "...can't do marathons since my ticker is lacking oxygen..." |
| RAN | Did marathons or sprints |
| TBS | Channel that's hosted an annual 24-hour "A Christmas Story" marathon since 1997 |
| HEART | Song beginning "Well, since my baby left me" |
| DWELL | 'Since my baby left me, I found a new place to ___...' (5) |
| ASCORBICACID | Since my book, one about detectives, it's essential to stay alive (8,4) |
| BRIG | Prison is dull, lacking oxygen and nitrogen (4) |
| BISMUTH | Element boron is on opening lacking oxygen (7) |
| TILER | One working high up, labourer lacking oxygen (5) |
| DEFLECT | Turn aside - awfully cold feet, lacking oxygen (7) |
| ASTERIDIANS | 'Starfish' (minor planet lacking oxygen) - Martians here? Only half of them (11) |
| ANTHRAX | Disease in granny's heart and chest, lacking oxygen |
| SMUT | Fungal disease of acer leaves - twisted taproots, lacking oxygen (3,4) |
| SPOT | Fungal disease of acer leaves - twisted taproots, lacking oxygen (3,4) |
| TAR | Fungal disease of acer leaves - twisted taproots, lacking oxygen (3,4) |
| TAKEANAP | Get a sleep apnoea disorder, lacking oxygen after partaking heartily (4,1,3) |
| SPROUT | Our pots lacking oxygen somehow show new growth (6) |
| HOVER | Former U.S. president lacking oxygen gets to remain in flight (5) |
| TANNIC | Lacking oxygen, nuts contain astringent |
| VIDWAN | Expert poet, lacking oxygen and weak (6) |
