Crossword Genius

Where seed located, briefly (2,1,8)

Ross

I believe the answer is:

in a nutshell

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

'briefly' is the definition.
(synonyms)

'where seed located' is the wordplay.
I cannot quite understand how this works, but
'seed' could be 'nut' (nut is a kind of seed) and 'nut' is found in the answer.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for in a nutshell that I've seen before include "Something hard to crack here" , "Briefly, concisely" , "To cut a long story short" , "Brazil's location" , "Expressed briefly" .)

I've seen this clue in The Telegraph.
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