| GREENER | Less mature but more ecologically sound (7) |
| USELESS | Ineffective to be more ecologically friendly |
| GOGREEN | Make ecologically sound decisions, and a hint to what the starred answers do |
| AMATEUR | A mature but confused non-professional (7) |
| YOUNGER | Say name backward, restricted by one's being less mature (7) |
| INGROUP | Closely knit bunch batting, mature but losing wicket (2-5) |
| MANAGES | He matures, but copes (7) |
| UNRIPER | Stupidly ruin a word for less mature? |
| PRICIER | Promotion less heated but more costly (7) |
| PETTIER | Less plain, lacking resistance, but more trivial (7) |
| GREENLAND | Eskimo country, ecologically sound nation (9) |
| GREENLANTERN | Ecologically sound light source? |
| THINNER | Solvent but more drawn (7) |
| COARSER | A score, possibly right but more vulgar (7) |
| OBTUSER | Rambling rose, but more dull (7) |
| BALMIER | Madder, but more pleasant a temperature (7) |
| CALIPER | Remade replica - but more than one is required for measuring (7) |
| GLAZIER | Window fitter, a legend, but more idle (7) |
| TACKIER | Stickier, but more shabby? (7) |
| CRUELER | With clue, err badly - like Torquemada, but more so (7) |
