A nephew of Robert Clements, 1st earl of Leitrim, Clements had sat for County Leitrim as a supporter of the government from 1805-18. His father, Henry Theophilus Clements (1734-95), had been a professional soldier who represented County Leitrim and Cavan borough in the Irish parliament from 1769-95, and by 1785 had secured government positions worth £2,400 per annum. His grandfather, Nathaniel Clements (1705-77), had been ‘one of the most prominent politicians’ in Ireland and served as Irish vice-treasurer.
During his first period in Parliament Clements had voted consistently against Catholic claims and enjoyed mixed fortunes as a candidate for several ‘lucrative revenue places’. Having declined a place on the Dublin Castle staff in April 1818, he was narrowly defeated at that year’s general election.
Clements’s younger brother, John Marcus Clements (1789-1833), had sat for County Leitrim as a Tory, 1820-6, 1830-2, and in August 1840 Clements was nominated by leading local Conservatives to a seat at County Cavan after the unexpected retirement of the sitting member, the Hon. Somerset Maxwell.
It was anticipated that Clements would return to the House as ‘a consistent supporter of every measure calculated to resist democracy on the one hand, and Popish aggression on the other’.
Clements sat across the House from his kinsman, William Sydney Clements, who represented County Leitrim as a Whig from 1839 until he succeeded as the 3rd earl of Leitrim in 1847.
Clements died suddenly of apoplexy at his Cavan residence in January 1843. He was buried in the family vault at Ashfield Church ‘amid an immense assemblage of the gentry and yeomanry of the county’, the coffin being borne by Lord Farnham and other leading members of the gentry.
