Crossword Genius

Gets empty urn out steadily (4,3)

Ross

I believe the answer is:

runs low

I'm a little stuck... Click here to teach me more about this clue!

'gets' is the definition.
Although both the answer and definition are verbs in their -s form, I can't see how they can define each other.

'empty urn out steadily' is the wordplay.
I cannot really see how this works, but
'empty' could be 'o' and 'o' is present in the answer.
an anagram of 'urn' is 'run' which is present in the answer.
This may be the basis of the clue (or it may be nonsense).

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