GR is King George I think and presumably the madness in the film about him refers to that.
I have an answer for 5D but I can't parse it, I have a word meaning "once", but I can't see where the king comes in? (parses as "in a good way" - as in I am ??? this motion + married + queen)
Not sure about 25A but I have a 4 letter government department around the symbol for silver and means "to be foolishly or excessively fond of someone", is that correct?