### Clue: Flipping hard exercises: Nutmeg's in time and they don't last long (8)
### Answer: EPHEMERA 
 ### Explanation: Flipping hard exercises: Nutmeg's in time and they don't last long (8)
<=**H**(ard) **P.E. **(exercises) + **ME** (Nutmeg) "in" **ERA** (time)