Does the district court's clearly erroneous denial of Petitioner's motion for grand jury transcripts pursuant to Fed. R. Crim. P. 6 and the Fifth Amendment warrant exercise of this Court's supervisory authority?

Does the district court’s clearly erroneous denial of Petitioner’s motion for grand jury transcripts pursuant Fed . R. Crim. P. 6 and the Fifth Amendment, combined with the likelihood that th is violation will otherw ise evade appellate review , warrant exercise of this Court’s supervisory authority?