| SANCTUARY | Rut can form in state nature reserve (9) |
| MOLDSPORES | They can form in a damp basement |
| AGATE | Rock that can form in petrified wood |
| PARACHUTE | With a cup, heart can form a pappus (9) |
| FROSTLINE | In our solar system, for example, it's the distance from the Sun where grains of ice can form, which is an important stepping stone for forming planets (5,4) |
| STEMCELLS | Staunch resistance groups, they can form any part of body as required (4,5) |
| FOODCHAIN | Ecological diet sequence, or what you can form by linking the starred answers together? |
| SERENGETI | Green site developed into a nature reserve (9) |
| ISLEOFMAY | National Nature Reserve in Firth of Forth (4,2,3) |
| FORSINARD | Sutherland location of an RSPB nature reserve (9) |
| WRENSNEST | World famous SSSI and nature reserve in Dudley - home of Britain's shortest bird? (5,4) |
| CORMORANT | Web-footed sea-bird, a winter visitor to Mallorca best seen at the Albufera nature reserve (9) |
| GALAPAGOS | Pacific nature reserve islands |
| SINGAPORE | Asian country home to Bukit at Timah Nature Reserve |
| RISK | Board game in which you can form alliances |
| MISALLIANCES | Bad marriages all one can form with the East in a spinster (12) |
| IODINE | An element in the halogen group that can form a dense violet-coloured vapour (6) |
| EGGO | Kellogg's brand you can form by using four of the letters in "Kellogg's" |
| DNA | Molecule that can form supercoils |
| ELM | Tree that can form natural tunnels |
