Indented Head during Meadowfest is the most green (8)

I believe the answer is:

leafiest

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'most green' is the definition.
Both the definition and answer are superlative adjectives. Maybe there's a link between them I don't understand?

I can't explain the remainder of the clue.

Can you help me to learn more?

(Other definitions for leafiest that I've seen before include "Naturally, most green (of suburbia)" , "Most verdant" .)

I've seen this clue in the Sydney Morning Herald.

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