### Clue: United supporters going round creating chaos (5)
### Answer: SNAFU 
 ### Explanation: Definition: chaos
 **Reversal of**(… going round) [ U(abbrev. for "united") + FANS(supporters of a particular person or thing) ].
Answer: …, acronym for "Situation Normal, All F***ed (or Fouled, even) Up", in other words, a mess.