### Clue: Unease about extremely reckless story raised in song (12)
### Answer: MARSEILLAISE 
 ### Explanation: Definition: song
 MALAISE(a feeling of unease whose exact cause is hard to identify) **containing**(about) [ **1st and last letters of**(extremely) "reckless" + **reversal of**(… raised, in a down clue) LIE(a story;a fabrication) ].
Defn: Preceded by "La", the French national anthem.