Pressing after short break to be on the up again (9)

I believe the answer is:

resurgent

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But I can't explain it at all! Could you help me understand?

(Other definitions for resurgent that I've seen before include "given new life" , "Coming back to life" , "Reviving after a lull" , "Reviving in popularity" , "rising again" .)

I've seen this clue in The Telegraph.

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