Conversation so far:
When did Walter Scott begin his baronetcy?
A grateful Prince Regent granted Scott the title of baronet, and in March 1820 he received the baronetcy in London, becoming Sir Walter Scott, 1st Baronet.
What does the Recovery of the Crown Jewels mean in the context of Walter Scott?
The Prince Regent gave Walter Scott permission to search for the Crown Jewels (Honours of Scotland). The honours were in Edinburgh Castle, but stories circulated that they had been lost.
Where did Walter Scott find the Crown Jewels?
On 4 February 1818, Walter Scott and a small team of military men opened the box, and unearthed the honours from the Crown Room of Edinburgh Castle.
How was Walter Scott rewarded for recovering the Crown Jewels?
A grateful Prince Regent granted Scott the title of baronet, and in March 1820 he received the baronetcy in London, becoming Sir Walter Scott, 1st Baronet.
What kind of ceremonial pageantry is associated with Walter Scott?
Walter Scott created a spectacular and comprehensive pageant, designed not only to impress the King, but also in some way to heal the rifts that had destabilised Scots society.
What rifts had destabilised Scots society?
This form of dress, proscribed after the 1745 rebellion against the English, became one of the seminal, potent and ubiquitous symbols of Scottish identity.

Question: What form of dress became one of the seminal, potent and ubiquitous symbols of Scottish identity?
Self-contained rewrite: What form of dress became one of the seminal, potent and ubiquitous symbols of Scottish identity because of Walter Scott?