Crossword Genius

Nut to leave boy sated, we hear? (7)

Ross

I believe the answer is:

filbert

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

'nut' is the definition.
(filbert is a kind of nut)

'leave boy sated we hear?' is the wordplay.
I cannot really see how this works, but
'boy' could be 'bert' and 'bert' is found within the answer.
The remaining letters 'fil' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...

'to' is the link.

Can you help me to learn more?

(Other definitions for filbert that I've seen before include "Type of hazelnut" , "Hazel nut" , "Nut -- left rib (anag)" .)

I've seen this clue in The Times.
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