Disorder, not so alien in parliament (7)
I believe the answer is:
knesset
'parliament' is the definition.
(parliament of Israel)
'disorder not so alien' is the wordplay.
I cannot quite see how this works, but
'alien' could be 'et' (extra terrestrial) and 'et' is present 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" , "Israel's parliament" , "Israeli parliament" .)