Crossword Genius

Ideal person for a wedding (4,3)

Ross

I believe the answer is:

best man

I'm a little stuck... Click here to teach me more about this clue!

'a wedding' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how one could define the other.

'ideal person' is the wordplay.
'ideal' becomes 'best' (similar in meaning).
'person' becomes 'man' (man is a kind of person).
'best'+'man'='BEST MAN'

'for' is the link.

Can you help me to learn more?

(Other definitions for best man that I've seen before include "Bridegroom's mate" , "Important supporting role at a wedding" , "Groom's primary attendant at wedding" , "Bridegroom's friend" , "The groom's right-hand supporter" .)

I've seen this clue in The Mirror.
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