Dense leader, later on, is more stupid (6)
I believe the answer is:
dafter
'more stupid' is the definition.
Both the answer and definition are comparative adjectives. Maybe you can see an association between them that I can't see?
'dense leader later on' is the wordplay.
'leader' says to take the initial letters.
'later on' becomes 'after' (I've seen this in another clue).
The initial letter of 'dense' is 'd'.
'd'+'after'='DAFTER'
'is' is the link.
Can you help me to learn more?
(Other definitions for dafter that I've seen before include "More foolish!" , "crazier" .)