Keeps occupied; tethers (4,2)

I believe the answer is:

ties up

I believe this clue is a double definition.

'keeps occupied' is the first definition.
(I've seen this in another clue)

'tethers' is the second definition.
(I've seen this before)

(Another definition for ties up that I've seen is " Tethers".)

I've seen this clue in The Times.

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