Happy to take in Europe? (9)
I believe the answer is:
continent
'europe?' is the definition.
(Europe is a continent)
'happy to take in' is the wordplay.
'happy' becomes 'content' (associated in meaning).
'to take' indicates putting letters inside (inserted letters are taken in).
'content' going around 'in' is 'CONTINENT'.
(Other definitions for continent that I've seen before include "Large landmass" , "Several countries maybe" , "Self-restrained" , "Europe, say" , "Virtuous" .)