| Rating | Solver | Clue |
|---|---|---|
| INGREDIENT | Essential component | |
| PROTEIN | Pointer about essential component of diet | |
| CONSTITUENT | That which constitutes or composes, as a part, or an essential part; a component; an element. | |
| ORGAN | A component part performing an essential office in the working of any complex machine; as, the cylinder, valves, crank, etc., are organs of the steam engine. | |
| METHYL | A hydrocarbon radical, CH3, not existing alone but regarded as an essential residue of methane, and appearing as a component part of many deriv... | |
| METHYLENE | A hydrocarbon radical, CH2, not known in the free state, but regarded as an essential residue and component of certain derivatives of methane; ... | |