Simply try some about northern oppression (7)
I believe the answer is:
tyranny
'oppression' is the definition.
(I've seen this before)
'simply try some about northern' is the wordplay.
I cannot really understand how this works, but
an anagram of 'try' is 'tyr' which is located in the answer.
'some' could be 'a' and 'a' is found within the answer.
'northern' could be 'n' (abbreviation e.g. N. Ireland) and 'n' is found within the answer.
The remaining letters 'ny' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for tyranny that I've seen before include "Dominance through threat of punishment and violence" , "Reign of terror" , "Dictatorship" , "Oppressive government" , "Cruel government" .)