The most common and most likely answer to this crossword clue is the 8 letter word TEACHING
I've seen this crossword clue in The Guardian
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More clues leading to the result TEACHING
- Edit it and change instruction
- Matter involving educating appalling children, primarily?
- Article admits every individual sharing hard exercise …
- Education after half-term’s suffering
- They must lose regulars, hurting profession
- Giving instruction to change it, unfortunately
- Advanced during college with trendy ‘good education‘
- Heartless, the painful profession of education
Buddy explains!

The straight part
We know that "Matter involving educating" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case matter involving educating = teaching.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does TEACHING mean?
TEACHING noun- Something taught by a religious or philosophical authority.
- The profession of educating people.
- To show (someone) the way; to guide, conduct; to point, indicate.
- (ditransitive) To pass on knowledge to.
- To pass on knowledge, especially as one's profession; to act as a teacher.
- (ditransitive) To cause to learn or understand.
- (ditransitive) To cause to know the disagreeable consequences of some action.