### Clue: Setter throwing up egg and a piece of chicken (7)
### Answer: GELATIN 
 ### Explanation: Definition: Setter
 **Reversal of**(throwing up, in a down clue) [ NIT(the egg of a louse or other parasitic insect) **plus**(and) A + LEG(a piece of chicken).
Defn: …/a substance that helps a liquid or semi-liquid become solid or thicker/set.