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Times to strike out, launching enterprise finally (4)

Ross

I believe the answer is:

eras

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'times' is the definition.
(era is a kind of time)

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

Can you help me to learn more?

(Other definitions for eras that I've seen before include "Periods, ages" , "Epochs" , "Periods of time" , "Long and distinct periods of history" , "At least two times" .)

I've seen this clue in The Telegraph.
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