The most common and most likely answer to this crossword clue is the 8 letter word MASTER’S
I've seen this crossword clue in The Guardian
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Buddy explains!

The straight part
We know that "Qualification" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case qualification = master’s.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 MASTER’S mean?
MASTER’S noun- Someone who has control over something or someone.
- The owner of an animal or slave.
- The captain of a merchant ship; a master mariner.
- The head of a household.
- Someone who employs others.
- An expert at something.
- A tradesman who is qualified to teach apprentices.
- A schoolmaster.
- A skilled artist.
- A man or a boy; mister. See Master.
- A master's degree; a type of postgraduate degree, usually undertaken after a bachelor degree.
- A person holding such a degree.
- The original of a document or of a recording.
- The primary wide shot of a scene, into which the closeups will be edited later.
- A parajudicial officer (such as a referee, an auditor, an examiner, or an assessor) specially appointed to help a court with its proceedings.
- A device that is controlling other devices or is an authoritative source.
- A person holding an office of authority, especially the presiding officer.
- (by extension) A person holding a similar office in other civic societies.
- To be a master.
- To become the master of; to subject to one's will, control, or authority; to conquer; to overpower; to subdue.
- To learn to a high degree of proficiency.
- To own; to possess.
- (especially of a musical performance) To make a master copy of.
- (usually with in) To earn a Master's degree.
- (in combination) A vessel having a specified number of masts.
- A master's degree.