East German's wealthy bird (7)
I believe the answer is:
ostrich
'bird' is the definition.
(ostrich is a kind of bird)
'east german's wealthy' is the wordplay.
'east german' becomes 'ost' ('east' in German).
'wealthy' becomes 'rich' (similar in meaning).
'ost'+'rich'='OSTRICH'
(Other definitions for ostrich that I've seen before include "The head-in-the-sand bird" , "World's largest bird" , "one tries to hide in the sand" , "Torch is held over large bird" , "Nut-burying type" .)