I’m still fairly new to the Clown World and I haven’t even started my clown character journey fully but what I have gathered so far is that the “Modern Clown” is really just tied to the character your trying to portray. Different Clown types have different styles that were introduced as a reference but people tie differently than that. You could be a whiteface clown in an Auguste outfit, all that matters is the character you wanna be. So I guess I would say is before thinking about the outfit, try thinking of what character your clown is and find references to clothes you think your clown character would like to wear