Peacemaker endlessly offers qualification (7)

I believe the answer is:

diploma

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'qualification' is the definition.
(type of academic qualification)

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for diploma that I've seen before include "Exam certificate" , "What a student seeks" , "Paper showing examination success" , "Course certificate" , "Document conferring honour" .)

I've seen this clue in The Sun.

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