The phrase "erstwhile administration" refers to a former or previous government or leadership. It is typically used to talk about a past administration that is no longer in power or currently in charge. Full definition
At that press conference, Mustapha Hamid actually wept, ostensibly to show to Ghanaians the extent to which the erstwhile administration was prepared to go to win that election. (ghanapoliticsonline.com)
Top politicians from major political parties paid glowing tribute to the former Minister of Tourism and Diasporan Relations, who served in the cabinet of the erstwhile administration of President John Agyekum Kufuor. (citifmonline.com)
A former Minister of Communications during the erstwhile administration has insisted that the President presented a «non-factual» state of the nation address. (ghanapoliticsonline.com)