Shrewd interpolation in any lawless state (7)
I believe the answer is:
anarchy
'lawless state' is the definition.
(I've seen this in another clue)
'shrewd interpolation in any' is the wordplay.
'shrewd interpolation' becomes 'arch' (I am not sure about this - if you are sure you should believe this answer much more).
'in' indicates putting letters inside.
'arch' going into 'any' is 'ANARCHY'.
Can you help me to learn more?
(Other definitions for anarchy that I've seen before include "Chaotic state" , "State of lawlessness and disorder" , "Utter lawlessness" , "Unrule" , "State of disorder in society" .)