Make a fuss of head of lab having to remove an electron (7)

I believe the answer is:

lionise

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'make' is the definition.
Both the answer and definition are verbs in their base form.
Perhaps there's an association between them I don't understand?

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

Can you help me to learn more?

(Other definitions for lionise that I've seen before include "'Celebrate, treat as a hero (7)'" , "Hero-worship" , "Treat as celebrity - like Leo?" , "honour" , "Make fuss of (celebrity)" .)

I've seen this clue in The Guardian.

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