The enemy bound to take its toll? You'll have to wait and see (4,4,4)

I believe the answer is:

time will tell

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'wait and see' is the definition.
(I've seen this before)

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

(Other definitions for time will tell that I've seen before include "You must be patient" , "Wait and see" , "Results are only to be clarified in the future" , "Try to measure speed of arrow" .)

I've seen this clue in The Times.

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