Its used to lift - or bring down (6)

I believe the answer is:

tackle

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'down' is the definition.
The definition and answer can be both acts as well as being singular nouns.
Perhaps they are linked in a way I don't understand?

I don't understand the remainder of the clue.

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(Other definitions for tackle that I've seen before include "Get to grips with" , "beard" , "block" , "Clobber" , "Take hold" .)

I've seen this clue in The Irish News.

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