Crossword Genius

Successor pronounced most of island free of earth? (8)

Ross

I believe the answer is:

airborne

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'free of earth?' is the definition.
Both the answer and definition are adjectives. Maybe they are linked in a way I don't understand?

'successor pronounced most of island' is the wordplay.
'successor' becomes 'heir' (synonyms).
'pronounced' shows a homophone (sound like).
'most of' means to remove the last letter.
'island' becomes 'Borneo' (Indonesian island).
'heir' is a homophone of 'air'.
'borneo' with its last letter taken off is 'borne'.
'air'+'borne'='AIRBORNE'

Can you help me to learn more?

(Other definitions for airborne that I've seen before include "in Hercules, perhaps" , "in the sky" , "so, paras?" , "as birds often are" , "In flight after taking off" .)

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