__ Declaration, name given to the 1917 expression of British government support for a Jewish homeland in Palestine (7)
I believe the answer is:
balfour
(Other definitions for balfour that I've seen before include "Prime minister nineteen hundred and two to nineteen hundred and five" , "- Declaration pledged support for Jewish state" , "Tory PM" , "Prime minister - hero of "Kidnapped"" , "5,27 [PRIME MINISTER]" .)