| Dual-___ engine | 15 |
| Dual-___ (like some engines) | 28 |
| Dual-___ | 8 |
| Dietary starch, for short | 25 |
| Dietary component, for short | 28 |
| Certain dieter's concern | 28 |
| Bread or pasta, e.g. | 20 |
| Bit of starch | 13 |
| Bit of pasta, for short | 23 |
| Auto-engine part, for short | 27 |
| Auto fuel mixer for short | 26 |
| Atkins diet taboo | 17 |
| Atkins anathema | 15 |
| __-loading: endurance strategy | 30 |
| ___ loading | 11 |
| Rifle | 5 |
| Semiautomatic rifle | 19 |
| Cavalry rifle | 13 |
| The M-1, for one | 16 |
| Sten gun | 8 |
| Spencer, e.g. | 13 |
| Semiautomatic weapon | 20 |
| Light rifle | 11 |
| Kind of rifle | 13 |
| ___-loading (marathon prep) | 27 |
| ___-loading (pre-marathon activity) | 35 |
| ___ loading (marathoner's prep) | 35 |
| ___ loading (marathon runner's strategy) | 44 |
| Runners' term | 17 |
| Pre-marathon food, briefly | 26 |
| Marathoner's prep, ___-loading | 34 |
| Loading lead-in | 15 |
| Charcoal | 8 |
| Bernie of the Red Sox | 21 |
| Bernie ___, former Red Sox slugger | 34 |
| "Hydrate" lead-in | 27 |
| __-loading (pre-marathon preparation) | 37 |
| __-loading | 10 |
| __-load: prep for a marathon | 28 |
| ___-loading (preparing for a marathon) | 38 |
| ___-loading (marathoner's tactic) | 37 |
| ___-loading | 11 |
| ___-load (prepare for a marathon) | 33 |
| __ loading (marathoner's ritual) | 36 |
| Kind of copy | 12 |
| Diamond makeup | 14 |
| Dating material | 15 |
| Diamond, essentially | 20 |
| Paper type | 10 |
| Type of copy | 12 |
| Southern Alberta hamlet | 23 |
| Old duplicate | 13 |
| Kind of dating | 14 |
| It may be used between the sheets | 33 |
| It can help you get a date | 26 |
| It can help you find a date | 27 |
| Graphite element | 16 |
| Element used in dating rocks | 28 |
| Element found in cast iron | 26 |
| Duplicating aid | 15 |
| Diamonds, essentially | 21 |
| Diamond, actually | 17 |
| Coal, essentially | 17 |
| Duplicate | 9 |
| Look-alike | 10 |
| Exact duplicate | 15 |
| Old-time duplicate | 18 |
| Elemental duplicate? | 20 |
| Clone to be filed? | 18 |
| Typist's duplicate of old | 29 |
| Contract clone (whose abbreviation hints at this puzzle's theme) | 68 |
| Measure of environmental impact | 31 |
| Environmental impact factor | 27 |
| What an environmentalist wants to reduce | 40 |
| Telecommuting reduces it | 24 |
| Dark gray piece of evidence for a tracker? | 42 |
| No-no on some diets | 19 |
| Atkins diet no-nos | 18 |
| Taboos of some diets | 20 |
| Pasta is loaded with them | 25 |
| Nutrients in pasta | 18 |
| Atkins no-nos | 13 |
| They're avoided on Atkins | 29 |
| Sources of energy | 17 |
| Pasta, potatoes, etc. | 21 |
| No-nos on some diets | 20 |
| Dieter's concerns | 21 |
| What dieters may cut | 20 |
| What bread is stuffed with? | 27 |
| Triathlete's pre-race intake | 32 |
| They're restricted in some diets | 36 |
| South Beach diet no-nos | 23 |
| Pre-race "loading" units | 34 |
| Potatoes and pasta, in slang | 28 |
| Pasta, potatoes and the like, briefly | 37 |
| Pasta, potatoes and the like | 28 |
| Pasta nutrients | 15 |
| No-nos in some diets | 20 |
| Marathoners' prerace intake | 31 |
| Marathoners' pre-race intake, perhaps | 41 |