Crossword Genius

Sustaining benefits from those who are waiting (8)

Ross

I believe the answer is:

servings

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

'sustaining benefits' is the definition.
I can't judge whether this definition defines the answer.

'from those who are waiting' is the wordplay.
I cannot quite understand how this works, but
'from' could be 'in' (I've seen this in other clues) and 'in' is found within the answer.
This explanation may well be incorrect...

Can you help me to learn more?

(Another definition for servings that I've seen is " parts of course?".)

I've seen this clue in The Globe and Mail.
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