Removes water from some tundra in Siberia (6)

I believe the answer is:

drains

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'removes water from' is the definition.
I can't judge whether this definition defines the answer.

'some tundra in siberia' is the wordplay.
'some' says the answer is hidden in the clue (some of the parts of the word are used).
'DRAINS' is hidden within 'tundra in siberia'.

Can you help me to learn more?

(Other definitions for drains that I've seen before include "Pipes to carry away liquid" , "System carrying away rain water" , "Pipes through which sewage is carried away" , "Runs out" , "Exhausts" .)

I've seen this clue in The Irish Independent.

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