Having real trouble parsing these. help greatly appreciated....
25a Dictator from one country runs into trouble (3,7) - BIG BROTHER (Dictator)
I can see the R(uns) into BOTHER (Trouble) part, but cannot get BIG from 'One country'.
4d Rules in place to cover circular letter writing (8) - THEOREMS (Rules)
8d Showing up of American in 18's address (5,2) - FOCUS ON
The answer to 18 is SWINDLE but apart from US for 'American', I'm at a loss for both wordplay and definition!