Risk territory between Ukraine and Siberia (4)
I believe the answer is:
ural
'risk territory between ukraine and siberia' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for ural that I've seen before include "River of central Russia" , "Asian flower" , "2,400 km river flowing through Russia and Kazakhstan into the Caspian Sea" , "Russian river flowing into the Caspian Sea" , "The .... Mountains divide Europe and Asia" .)