### Clue: Gloom and doom with this blue mood, not married sadly (6-1)
### Answer: DOUBLE-O 
 ### Explanation: Definition: Gloom and doom with this
 **Anagram of**(… sadly) ["blue mood" **minus**(not) "m"(abbrev. for "married") ].
Defn: What the words "gloom" and "doom" have – and "mood" too.