Return to the fray for plum-like fruit without a starter

I believe the answer is:

reengage

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'return' is the definition.
Both the answer and definition are verbs in their base form.
Maybe there's a link between them I don't understand?

I don't understand the rest of the clue.

Can you help me to learn more?

(Another definition for reengage that I've seen is " Again take on".)

I've seen this clue in the Irish Times.

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