Genius, blessed person accommodated by German couple? (8)
I believe the answer is:
einstein
'genius' is the definition.
(albert einstein)
'blessed person accommodated by german couple?' is the wordplay.
'blessed person' becomes 'st' (saint).
'accommodated' indicates putting letters inside.
'by german' becomes 'ein' (I am not sure about this - if you are sure you should believe this answer much more).
'couple?' shows that letters should be duplicated (I've seen 'couple' mean this).
'ein' doubled is 'einein'.
'st' going inside 'einein' is 'EINSTEIN'.
(Other definitions for einstein that I've seen before include "Albert -, relativity physicist" , "Famous physicist, mathematician" , "Disney's 14 [GREAT DANE]" , "who strove for world peace" , "Highly influential German physicist" .)