### Clue: Party girl has to crash after 5.30? (6,4)
### Answer: FIANNA FAIL 
 ### Explanation: Definition: Party
  [ANNA(girl's name) **plus**(has) FAIL(to crash)] **placed after**(after) FI(as time of day, 5.30 = half past five = half five = "fi",half its letters).   Though in some other languages, half of six (or its equivalent) = 5.30.
Answer:  Irish political party.  I took a long time trying to parse "vienna ball", having perfunctorily rejected political party because I couldn't think of such a party fitting the checking letters  Until, I thought "think non-English – Irish".  My COD for the clever device.