Crossword Genius

Boost (10)

Ross

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3 6 7

10

5*

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

This is all the clue.

(Other definitions for supplement that I've seen before include "something to remedy a deficiency" , "additive" , "addition" , "Add to (something)" , "Boost" .)

I've seen this clue in The Telegraph.
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