From Longman Dictionary of Contemporary Englishbanking/drug/health etc czarbanking/drug/health etc czarAmerican EnglishHIGH POSITION OR RANK someone who is very powerful in a particular job or activity → czar
Examples from the Corpus
banking/drug/health etc czar• Standouts include Douglas's anti-drugs czar whose daughter is a crackhead.• Barry R.. McCaffrey, White House drug czar.• When drug traffic escalates, they appoint a national drug czar.• Similarly, when Dole asserts that Clinton reduced the office of drug czar by 83 percent, he is on solid ground.• Our drug czar watches in impotence as shooting wars between drug gangs erupt in city after city. 