| STRENGTHS | Qualities regarded as being beneficial or a source of power (9) |
| SYMBIOTIC | Mutually beneficial ... or a hint to three pairs of crossing answers in this puzzle |
| ADVANTAGEOUS | Data's vague on rambling being beneficial (12) |
| NONENTITY | Person regarded as being of no importance or significance (9) |
| SEED | Word for a grain, kernel, nut, pip, stone or other sown propagule or embryo of a plant, thus a beginning, origin of an idea or a source; or, one of a contest's top contenders, scattered throughout a t |
| WATERMILL | Desire to adopt a name for a source of power |
| STRONGMAN | Person seen as a source of power, capability, etc |
| SIZEWELLB | It's a source of power, laments 19 audibly (8,1) |
| SOLARCELL | Old tree cut down in market for a source of power |
| THORN | Prickle of a may tree or rose; or, a source of annoyance or irritation (5) |
| ENGINE | Word for cunning/skill originally, later a weapon of war; a machine, such as a locomotive, as a source of power; or, any agent to effect a purpose (6) |
| BULB | Rounded part of a thermometer, pipette or classic bike horn; or, a source of incandescent light (4) |
| SPANNER | A wrench for applying torque to nuts and bolts; or, a source of annoyance or hindrance (7) |
| SUPPLY | Substitute schoolteacher, vicar etc; or, a source of water or electricity (6) |
| BATTERY | Device containing one or more dry-cells as a source of power; series of cages for egg-laying hens; set of cooking utensils; or, a marching percussion ensemble (7) |
| BOTTLE | Courage - or a source of Dutch courage (6) |
| TOTEM | A person or thing regarded as being symbolic or representative of a particular quality (5) |
| LADY | A woman regarded as being of superior social status or as having refined manners |
| MUSCLE | Tissue of animal body functioning as a source of power (6) |
| MANNAFROMHEAVEN | Something beneficial or pleasing that appears or is provided unexpectedly or opportunely (5,4,6) |
