Male descendant granted organs for transplant? (5-8)

I believe the answer is:

great-grandson

I'm a little stuck... Click here to teach me more about this clue!

'male' is the definition.
(I know that great-grandson is a type of male human)

'descendant granted organs for transplant?' is the wordplay.
'granted organs' can be anagrammed to 'GREAT-GRANDSON'.
Though, I'm unsure how this is indicated.

Can you help me to learn more?

(Another definition for great-grandson that I've seen is " Arranged tongs (anag) - descendent".)

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

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