Nickname for Posh Hat Worn by Men at Royal Ascot

This page is the CodyCross answer for the clue below from Water Park, Group 760, Puzzle 4 (Sports Activities).

Question is: Nickname for Posh Hat Worn by Men at Royal Ascot

and the answer is: TOPPER

Word Meaning:

TOPPER — Something that is on top.

Definitions from Wiktionary.