Country divided by stupid leader's sycophants (3-3)
I believe the answer is:
yes-men
'sycophants' is the definition.
(people who unquestioningly follow authority)
'country divided by stupid leader's' is the wordplay.
'country' becomes 'yemen' (Yemen is an example).
'divided by' is an insertion indicator.
'leader' indicates taking the first letters.
The initial letter of 'stupid' is 's'.
'yemen' going around 's' is 'YES-MEN'.
(Other definitions for yes-men that I've seen before include "Sycophants" , "lackeys" , "Toadies" .)