A local group overseeing education is illiterate (10)
I believe the answer is:
unschooled
'illiterate' is the definition.
(thesaurus)
'a local group overseeing education' is the wordplay.
'a local group' becomes 'uned' (I can't justify this - if you can you should believe this answer much more).
'overseeing' is an insertion indicator (I've seen this in other clues).
'education' becomes 'school' (school is a kind of education).
'uned' going around 'school' is 'UNSCHOOLED'.
'is' is the link.
Can you help me to learn more?
(Another definition for unschooled that I've seen is " Lacking formal education".)