Gather to see fool embarrass leaders with gullible followers (8)
I believe the answer is:
assemble
'gather' is the definition.
(I know that gather can be written as assemble)
'fool embarrass leaders with gullible followers' is the wordplay.
I cannot really see how this works, but
'fool' could be 'ass' (both can mean a stupid person) and 'ass' is located in the answer.
This may be the basis of the clue (or it may be nonsense).
'to see' acts as a link.
Can you help me to learn more?
(Other definitions for assemble that I've seen before include "Gather or congregate together" , "fit together" , "Gather together in one place" , "Collect in one place" , "Build" .)