Crossword Genius

Show-off one to wear fancy tie in this box (13)

Ross

I believe the answer is:

exhibitionist

But I can't explain it at all!

(Other definitions for exhibitionist that I've seen before include "Flasher?" , "Show-off" , "Attention-seeker" .)

I've seen this clue in The Times.
Want a hint initially instead of a full solution? Install my app