Tries hard, so the foolish investors will suffer no loss (7)

I believe the answer is:

strives

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'tries hard' is the definition.
(I've seen this in another clue)

I don't understand the rest of the clue.

(Other definitions for strives that I've seen before include "Contends" , "Struggles" , "Endeavours" , "Works hard" , "Makes great effort, tries hard" .)

I've seen this clue in the Evening Standard.

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