Where seed located, briefly (2,1,8)
I believe the answer is:
in a nutshell
'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" .)