Crossword Genius

You’ll end up suffering, as undertaker might put it? (3,4,7)

Ross

I believe the answer is:

its your funeral

'you'll end up suffering' is the definition.
(phrase used to warn someone about a bad idea)

I don't understand the rest of the clue.

(Another definition for its your funeral that I've seen is " not my responsibility!".)

I've seen this clue in The Times.
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