Case of intolerable situation for teacher’s union? (8)
I believe the answer is:
nutshell
'case' is the definition.
(nutshell is a kind of case)
'intolerable situation for teacher's union?' is the wordplay.
I cannot really understand how this works, but
'situation' could be 'hell' (I have seen 'Nasty situation ' mean 'hell' so perhaps 'situation' could also mean 'hell') and 'hell' is located in the answer.
'union?' could be 'nut' (National Union of Teachers) and 'nut' is located in the answer.
A single letter 's' remains which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
'of' is the link.
Can you help me to learn more?
(Other definitions for nutshell that I've seen before include "Kernel holder" , "succinct" , "Part of Brazil" , "One on almond" , "Ten hulls (anag)" .)