Haman suggested public honor involving royal robes, the king’s horse, and a proclamation through the city square (Esther 6:7–9). The king then ordered Haman to do exactly that for Mordecai, so Haman led Mordecai through the city honoring him (Esther 6:10–11).
In Esther 6:6–9, the king asks Haman to propose a reward for “the man” the king wants to honor. Haman privately assumes the king means him, so he recommends an honor package that closely associates the recipient with royal status: the king’s own clothing, the king’s horse with a royal emblem, a public procession, and an official proclamation. This scene sits inside a chain of reversals. After Esther’s first banquet, the king cannot sleep and has court records read aloud, discovering Mordecai was never rewarded for exposing an earlier plot.
Esther 6:6–9 shows how royal “honor” works as public, political theater. The king asks Haman to propose a reward for “the man” the king wants to honor, and Haman privately assumes the king must mean him. That inner assumption (explicit in verse 6) drives the whole proposal.
A careful answer keeps the immediate passage, the book's argument, and the whole-Bible storyline together, so the question is answered in context instead of as a detached idea.
Start with Esther 6:7-9, then read the surrounding section so the answer stays connected to the passage's flow.
7Haman said to the king, For the man whom the king delights to honor,
8let royal clothing be brought which the king uses to wear, and the horse that the king rides on, and on the head of which a crown royal is set:
9and let the clothing and the horse be delivered to the hand of one of the king`s most noble princes, that they may array the man therewith whom the king delights to honor, and cause him to ride on horseback through the street of the city, and proclaim before him, Thus shall it be done to the man whom the king delights to honor.