Get the double ten (5)

I believe the answer is:

score

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'get' is the definition.
(I know this)

I don't understand the rest of the clue.

(Other definitions for score that I've seen before include "obtain illegal drugs ..." , "purchase of illegal drugs" , "Result" , "Put ball in the net" , "Chalk up - twenty" .)

I've seen this clue in the Evening Standard.

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