What risk-averse people want, certainly (2,2,4)

I believe the answer is:

to be sure

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

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

(Other definitions for to be sure that I've seen before include "I admit" , "Undoubtedly" , "Admittedly" , "Without doubt" , "Of course, certainly" .)

I've seen this clue in The Times.

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