A Parisian leading a hundred crazy males in America (5,3)
I believe the answer is:
uncle sam
'america' is the definition.
(I've seen this before)
'a parisian leading a hundred crazy males' is the wordplay.
'a parisian' becomes 'un'.
'leading' says to put letters next to each other.
'a hundred' becomes 'c' (Roman numeral).
'crazy' indicates an anagram.
'males' anagrammed gives 'lesam'.
'un'+'c'+'lesam'='UNCLE SAM'
'in' is the link.
(Other definitions for uncle sam that I've seen before include "Iconic male relative for America" , "Cotton on" , "Personification of USA" , "Clue's man? (anag)" , "America personified" .)