### Clue: Official enquiry initially into United proved wrong (7)
### Answer: REFUTED 
 ### Explanation: Definition: proved wrong
 REF(short for "referee", a football match official) + { **the 1st letter of**(initially) "enquiry " **contained in**(into) UTD(abbrev. for "United", as in Man Utd) }. Nice surface, as there have been official enquiries into Man U matches.