| LISTLESSNESS | A lack of energy or spirit (12) |
| LANGUID | Without energy or spirit (7) |
| APATHY | Lack of energy or enthusiasm (6) |
| LANGUOR | Lack of energy or alertness (7) |
| LETHARGY | Lack of energy or vitality (8) |
| FATIGUE | Clip of combat outfit suffering from a lack of energy (7) |
| HALFHEARTEDNESS | She's a left-hander, sadly showing a lack of energy (4,11) |
| OILCRISIS | Problem that might arise from a lack of energy |
| LETHARGIC | Feeling a lack of energy and enthusiasm (9) |
| SLUGGISHNESS | Unusual lack of energy |
| PALIMPSEST | Nuisance admits a lack of energy at school producing reused manuscript (10) |
| PLUCK | A short sharp pull of an eyebrow, fowl's feather or fruit from a tree; a strum or twang of a musical string; or, the heart, liver and lungs of an animal, hence courage, guts, heart or spirit (5) |
| CALORIE | Unit of energy or heat originally defined as the amount of heat required at a pressure of 1 standard atmosphere to raise the temperature of 1 gram of water 1degrees Celsius. Since 1948 this unit has b |
| SOUL | Psyche or spirit; essence or essential part; sound-post or "anima" of a violin; or, the lungs of a goose (4) |
| BEAM | A line of energy or radiation sent in a particular direction (4) |
| FUEL | Based on Latin for "fireplace, hearth", word for coal, gas, oil, petrol, wood etc, burned to produce heat or power; food, as a source of energy; or, any stimulus that inflames emotion (4) |
| DYNAMO | Person with a ton of energy or an electrical generator |
| GHOST | A spectre or spirit; a person's soul; semblance; a faint trace, glimmer or vestige; or, a 1990 film featuring the song Unchained Melody (5) |
| SOLAR | Kind of energy or battery |
| LISTLESS | Devoid of energy or concern (8) |
