### Clue: Order given to ignore boner under newspaper — a dreadful rule! (5,2,6)
### Answer: REIGN OF TERROR 
 ### Explanation: Definition: a dreadful rule
 **Anagram of**(Order given to) IGNORE + [ERROR(a boner/a stupid mistake) **placed below**(under, in a down clue) FT(abbrev. for the Financial Times newspaper) ].