Pick up very quickly (4)

I believe the answer is:

grab

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'pick up' is the definition.
(thesaurus)

I can't explain the remainder of the clue.

(Other definitions for grab that I've seen before include "'Seize, snatch (4)'" , "Brag about seizure" , "Seize roughly" , "Impress" , "interest" .)

I've seen this clue in the Evening Standard.

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