Potion put through screen picked up (7)

I believe the answer is:

philtre

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'potion' is the definition.
(philtre is a kind of potion)

I don't understand how the remainder of the clue works.

(Other definitions for philtre that I've seen before include "Magic love potion" , "Exciting drink" , "Love-potion" , "It makes you love" .)

I've seen this clue in The Independent.

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