### Clue: Patience, maybe, required in work over time covering European racing event (8)
### Answer: OPERETTA 
 ### Explanation: Definition: Patience, maybe
 OP(abbrev. for "opus", a musical or literary work) **placed above**(over, in a down clue) ERA(a long period of time) **containing**(covering) [ E(abbrev. for "European") + TT(abbrev. for the Tourist Trophy motorcycle races, the annual Isle of Man event)].
Defn: Of which Patience by Gilbert and Sullivan is an example;maybe.