Where players sit close to Alcaraz after intro from Sue Barker (5)

I believe the answer is:

spitz

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'where players sit close to alcaraz after intro from sue barker' is the definition.
Although both the answer and definition are singular nouns, I don't see how one could define the other.

This is the entire clue.

Can you help me to learn more?

(Other definitions for spitz that I've seen before include "Pomeranian dog" , "eg Samoyed" , "Mark --, US swimmer" , "Little dog" .)

I've seen this clue in The Guardian.

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