### Clue: Company backs Conservative I state is a bit of a nut (7)
### Answer: OCCIPUT 
 ### Explanation: Definition: a bit of a nut
 **Reversal of**(… backs) CO(abbrev. for "company";a commercial concern) + C(abbrev. for a member of the Conservative Party) + I + PUT(to state;to express).
Defn: A part of your head, the latter refered to by the slang "nut".