Groom's bud at some weddings (4,3)

I believe the answer is:

best man

(Other definitions for best man that I've seen before include "Bloke participating in match" , "Important supporting role at a wedding" , "Groom's primary attendant at wedding" , "Bridegroom's friend" , "The groom's assistant at a wedding" .)

I've seen this clue in the USA Today.

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