Ring holder (4,3)
![Ross](/clue/static/ross-mug.min.png)
'ring holder' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for best man that I've seen before include "Supporting male actor at a wedding" , "Groom's friend" , "The groom's assistant at a wedding" , "Groom's primary attendant at wedding" , "Important supporting role at a wedding" .)
(Other definitions for finger that I've seen before include "shop" , "Touch; select" , "Index" , "Feel" , "See 24" .)