Thick young people expect leaders to be kind (4)
I believe the answer is:
type
'be kind' is the definition.
(I've seen this before)
'thick young people expect leaders' is the wordplay.
'leaders' indicates taking the first letters.
The first letters of 'thick young people expect' is 'TYPE'.
'to' acts as a link.
(Other definitions for type that I've seen before include "Class, kind or printed characters" , "Sort; printed letters" , "Genre" , "Category; use keyboard" , "Category, sort" .)