Wealthy creature around East German house (9)
I believe the answer is:
reichstag
'german house' is the definition.
(German parliament building)
'wealthy creature around east' is the wordplay.
'wealthy' becomes 'rich' (similar in meaning).
'creature' becomes 'stag' (stag is a kind of animal).
'around' means one lot of letters goes inside another.
'east' becomes 'e' (abbreviation).
'rich'+'stag'='richstag'
'richstag' going around 'e' is 'REICHSTAG'.
(Other definitions for reichstag that I've seen before include "German tourist attraction" , "old German house" , "government building" , "diet in Germany" , "European parliament" .)