| CORM | Bulb-like underground reproductive structure such as that of the crocus (4) |
| FABRIC | Word for a textile or its texture; or, structure, such as that of society (6) |
| IRID | Any plant of the crocus family |
| SAFFRON | Dried orange stigmas of the crocus, used as a spice (7) |
| WORK | Energy transfer measured in joules; a creation such as a book, musical composition or piece of embroidery, sewing etc; or, a structure such as a wall, built as part of a fortification (4) |
| ARIL | Botanical structure such as the mace surrounding nutmeg, ruby "jewel" of a pomegranate pip or the scarlet "berry" cup of a yew seed (4) |
| BILL | Promontory such as that of the Isle of Portland in Dorset (4) |
| IAGO | Animated parrot of film whose voice is the same as that of the Aflac duck |
| ARCH | Structure such as The Gateway of India |
| BEAM | Timber structure such as a joist, lintel, rafter or sleeper (4) |
| ROOF | Structure such as a thatch (4) |
| SEED | Botanical structure such as a peanut or almond |
| IRIS | Plant family that includes the crocus |
| SPIRE | Steeple; blade of grass; apex of a shell such as that of the periwinkle; or, a towering stem of a flower such as a delphinium or foxglove (5) |
| ASCI | Reproductive structures |
| SCALA | A ladder-like structure, such as one of the spiral canals in the cochlea |
| COMPOSITE | Botanical description of a flower of a plant in the aster family such as that of the daisy, dandelion or chamomile (9) |
| MIGRATION | Seasonal journey of the population of a species from one habitat to another, such as that of the humpback whale, Atlantic salmon, woodcock, swift or painted lady butterfly (9) |
| BULBS | Underground parts of plants such as the crocus, dahlia, winter aconite, chionodoxa (glory-of-the-snow) snowdrop and narcissus (5) |
| CHIASMA | Crossing over of two parts or structures such as the fibres of the optic nerves in the brain |
