### Clue: Teacher perhaps catches child that's very loud, unendingly naughty (11)
### Answer: MISCHIEVOUS 
 ### Explanation: Definition: naughty
 MISS(what schoolchildren might;perhaps call their female teacher) **containing**(catches) [ CH(abbrev. for "child") + I.E.(abbrev. from Latin "id est";that is;that's) + V(abbrev. for "very"] + "loud " **minus its 1st and last letters**(unendingly;without ends) ].