Quite happy about, in Europe? (9)
I believe the answer is:
continent
'europe?' is the definition.
(Continent is an example)
'quite happy about in' is the wordplay.
'quite happy' becomes 'content'.
'about' means one lot of letters goes inside another.
'content' enclosing 'in' is 'CONTINENT'.
(Other definitions for continent that I've seen before include "chaste" , "huge area of land" , "Africa, say" , "Africa, for example" , "Monk vows" .)