Where many visitors came gathering round the city head? (5)

I believe the answer is:

mecca

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

(Other definitions for mecca that I've seen before include "Pilgrimage destination" , "Holiest city of 13 Across, place of annual pilgrimage" , "Tourist magnet" , "place many visit" , "Holiest city of Islam" .)

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