Crossword Genius

With which court proceedings ensue? (7)

Ross

I believe the answer is:

service

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'ensue?' is the definition.
Although both the answer and definition are verbs in their base form, I can't see how they can define each other.

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for service that I've seen before include "tree" , "following 28 [SILVER]" , "start of action in court" , "funeral, say" , "Work done by one for the benefit of another" .)

I've seen this clue in The Telegraph and The Sun.
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