A couple of characters put over edge about orator's tirade (9)

I believe the answer is:

philippic

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But I can't explain it at all! Could you help me understand?

(Other definitions for philippic that I've seen before include "Verbal attack" , "Speech denouncing" , "angry speech" , "Denunciatory speech" , "King of Spain" .)

I've seen this clue in The Guardian.

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