Wiktionary
shadow minister
n. (In British and some Commonwealth parliaments) a member of an opposition party, with responsibility for a particular portfolio.
Usage examples of "shadow minister".
A Shadow Minister on the opposition benches who had the temerity to paraphrase Oscar Wilde to the effect that one man dying for a cause did not make that cause valid was duly pilloried by the tabloids with one Hatry organ promising its readers shocking revelations about the man's luckless sex life.