The phrase "apt illustration" means a fitting or suitable example that helps explain or demonstrate a particular idea, concept, or situation. Full definition
Weird in his comments, unguarded in his conducts, Fani - Kayode is your typical, apt illustration of delinquency that has defied remedies. (nigeriapoliticsonline.com)
It makes clear the rigorous nature of Zen training, and gives many apt illustrations from Zen literature. (religion-online.org)
This decision taken by the BC government is apt illustration of ignorance in the truest sense of the word. (slaw.ca)