Fool who means a great deal to Charlie? (4)
I believe the answer is:
clot
This clue might be a double definition.
'fool who means a great deal' is the first definition.
'clot' can be an answer for 'fool' (I've seen this in other clues). I am unsure of the rest of the definition.
'to charlie?' is the second definition.
(both can mean a foolish person)
Can you help me to learn more?
(Other definitions for clot that I've seen before include "Semi-solid mass -- dunce" , "Coagulated blood; twit" , "Silly billy" , "Stupid person - lump of blood" , "Clumsy person" .)