Someone taking charge of Switzerland alongside high-flyer (8)
I believe the answer is:
chairman
'someone taking charge' is the definition.
(eg the chair of an organisation)
'switzerland alongside high-flyer' is the wordplay.
'switzerland' becomes 'ch' (short for Confoederatio Helvetica, its Latin name).
'alongside' means one lot of letters go next to another.
'high flyer' becomes 'airman' (I've seen this in another clue).
'ch'+'airman'='CHAIRMAN'
'of' is the link.
(Other definitions for chairman that I've seen before include "Presiding officer at meetings" , "official in authority" , "A leader of meetings" , "Committee, club, head" , "president" .)