Caspian Sea feeder
I believe the answer is:
'caspian sea feeder' 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 "Mountain range in Russia" , "Russian river giving name to mountain range" , "Russian river flowing into the Caspian Sea" , "Russian river, rising in the mountains between Europe and Asia" , "River feeding Caspian Sea" .)