| GASEOUS | So usage becomes like hydrogen, nitrogen and such |
| GAS | Hydrogen, nitrogen or the like found in smorgasbords |
| AMMONIA | Hydrogen/nitrogen compound |
| ASHCAN | American container for waste material, like hydrogen, calcium and nitrogen (3,3) |
| ODOURFREE | Like hydrogen and oxygen, forbidding iron to retain rhenium (5-4) |
| STUMBLE | When the saint becomes like Uriah Heep, he"ll err (7) |
| SABRETOOTHED | Outwardly calmed, wild bear with time becomes like an old tiger |
| EVOLVESINTO | Becomes, like an Ivysaur from a Bulbasaur |
| TREACHEROUS | How sour teacher becomes like a traitor (11) |
| ASH | Like hydrogen, it's left after a fire (3) |
| EGGY | Smelling like hydrogen sulphide |
| BUMBLE | Falter and start to become like Uriah Heep (6) |
| BOVINE | Be seen with a sheepish look and become like an ox (6) |
| ODORLESS | Like hydrogen |
| GASIFY | First piece of garbage, say, if transformed gets to be like hydrogen? (6) |
| CHOKE | It's used to regulate an amount of gas, like hydrogen, in fuel (5) |
| REVERTTOTYPE | Become like earlier models again and resume use of letter-press (6,2,4) |
| ADDLE | To become like a rotten egg - walk like a duck, with no head! (5) |
| EVASIVE | Save up - setter's become like a politician (7) |
| SERAPHIC | Transformed harpies about to become like angels (8) |
