| ZEIN | Protein occurring in maize (4) |
| RICIN | Highly toxic protein occurring in the seeds of the castor-oil plant in the family Euphorbiaceae (5) |
| LACTALBUMIN | Amino acid-rich protein occurring in milk, commonly called whey protein (11) |
| ELASTIN | Protein occurring in ligaments and tendons |
| CASEIN | Main protein occurring in milk, precipitated by the action of the enzyme rennin; from Latin, ' cheese' ( 6) |
| RIBOSOME | Minute particle of RNA and associated proteins occurring in all living cells; the site of protein synthesis (8) |
| TAMALE | Mexican dish comprising minced meat mixed with crushed maize and seasonings, wrapped in maize husks and steamed |
| ZANTE | Insect hiding in maize having abandoned a wood |
| CORNCOB | Hard particle horse found in maize (7) |
| SYNC | Occurring in unison in Seychelles and North Carolina (4) |
| ACID | Colourless, corrosive, fuming liquid, occurring in ants and in various plants (6,4) |
| IRON | Ferrum occurring in some types of meteorites; a stirrup; or, a safety curtain in a theatre (4) |
| MICA | From Latin for "crumb", a lustrous silicate mineral occurring in glittering scales or in crystals (4) |
| STYE | Infection occurring in the first year (4) |
| YANK | Jerk's name occurring in trivial talk (4) |
| NEON | Inert gas occurring in the atmosphere (4) |
| GUHR | Loose earthy deposit from water occurring in the cavities of rocks, consisting of a varying mixture of clay or ochre (4) |
| ALGA | Unicellular or multicellular organism occurring in water or moist ground (4) |
| MIST | Thin fog occurring in autumn over damp meadows and inland waters (4) |
| BOMB | Fail marks occurring in dip |
