The phrase "a bold appeal" is correct and usable in written English.
It can be used to describe a strong or daring request or invitation, often in persuasive contexts.
Example: "The charity made a bold appeal for donations during the event, urging attendees to contribute generously."
Alternatives: "a daring request" or "a strong plea".
The move is a bold appeal to older voters.
He had co-authored Charter 08, a bold appeal for democratic reforms in China.
In a bold appeal to Baxalta's shareholders, Shire claimed that merging the two companies would create "the global leader in [treating] rare diseases" with combined sales of $20bn by 2020.
With self-employed people set to eclipse the number of public sector workers, finally there was a bold appeal for their support: a recognition that they value their independence, but not the insecurity, with an offer of social security and the finance to allow "successful innovators" to "grow their businesses and generate employment".
It featured the kindly visage of Paul Giamatti the sad-eyed star of Sideways and a bold appeal in all caps: "GET PAUL HIS WAX".
At this point his physical whereabouts are unknown, but on Friday he emerged on the internet, in the form of a bold video appeal to China's premier, Wen Jiabao .Dear Premier Wen.
On Sunday, Meng's wife made a bold public appeal from France to the international community to help locate her husband.
PRESIDENT BUSH's bold appeal last week for all nations in the Middle East to embrace democracy had great historical resonance, at least in the White House's vision.
On Wednesday and Thursday the newspaper had printed bold appeals for Chen's release, saying there was no evidence he had committed a crime, and that journalists should not be criminally prosecuted for responsibly reporting facts that may embarrass influential companies or individuals.
EST| A newspaper based in the southern Chinese city of Guangzhou has published a bold, front-page appeal for the release of a detained reporter, prompting an outpouring of support online and sympathetic statements from prominent media and business figures.
And Mr. Engel -- and not a few of his supporters -- suggested that, in appealing to black pride, Mr. Seabrook had injected race into the campaign in a bold and racist appeal to black voters.
