Youth and king upset about fascist force in parliament (7)
I believe the answer is:
knesset
'parliament' is the definition.
(parliament of Israel)
'youth and king upset about fascist force' is the wordplay.
I cannot really understand how this works, but
'and' could be 'n' (common abbreviation for 'and') and 'n' is found within the answer.
'king' could be 'k' (chess abbreviation) and 'k' is present in the answer.
'force' could be 'e' (E is the symbol of electromotive force) and 'e' is found in the answer.
This explanation may well be incorrect...
'in' acts as a link.
Can you help me to learn more?
(Other definitions for knesset that I've seen before include "Israel parliament" , "Israeli parliament" , "Israel's parliament" .)