In October, 1832, he said that he was 77 years old on December 10, last.
Adam Clapp was a Revolutionary War soldier, Service record on file at the National Archives, Washington, D.C. file # S30937. Adam Clapp, while living in Guilford County, North Carolina, volunteered as a private in the fall of 1776, served in Captain Henry Whitsell's Company, Colonel Alexander Martin's Regiment. From notes of Ethel Perry Moore 1902-1974
You can read Adam Clapp's Pension Application and the entire Pension File here. 
In the Declaration for a pension which he signed on 16 October 1832, Clapp said that, about five years after the end of the Revolutionary War, he moved to Tennessee, where he stayed for twenty-two years. He then moved to Union County, Illinois, and lived there until a year before he filed the Declaration, 1832. Then he moved to neighboring Alexander County, Illinois, where he was currently living.
S-06 Title: Case Files of Pension and Bounty-Land Warrant Applications Based on Revolutionary War Service, compiled ca. 1800 - ca. 1912, documenting the period ca. 1775 - ca. 1900, Publication: National Archives and Records Administration, Record Group 15, Records of the Veterans Administration, NARA microfilm publication M804. Repository: #Fold3
S-07 Title: Find A Grave Publication: Online database URL: www.FindAGrave.com
It may be possible to confirm family relationships with Adam by comparing test results with other
carriers of his Y-chromosome or his mother's mitochondrial DNA.
However, there are no known yDNA or mtDNA test-takers in his direct paternal or maternal line.
It is likely that these autosomal DNA test-takers will share DNA with Adam: