This was from Tuesday 19 Feb 2013. The answer was given the next day so the answertr is known, but what I seek, is an explanation of how the answer was deduced.
The clue: Again show one Tudor or another, as placed in succession.
The answer: Rerun.
I see Rerun could be "again show", but the rest of the clue I am stumped over.
2 of the Tudors are Edward VI and Elizabeth I who can both be referred to as E.R., and so put that, i.e one Tudor or the other, in succession = RUN R er UN