The grandson of a prominent Liverpool merchant, who had purchased the manors of Adlington and Worthington c.1690,1T. C. Porteous, Standish, 219; Genealogist, n.s. xxvi. 141. The genealogy in Burke’s Landed Gentry (1848) is incorrect. Clayton, a successful London lawyer, became prominent in Lancashire affairs after succeeding to the family estates. In 1743 the Wigan corporation agreed to choose him as their recorder, provided he could ‘attend to the business of the corporation, the county and quarter sessions’, although it was realized they could not expect him ‘at any other times than in the two long vacations’, and that even then his stay would be short.2Alex. Leigh to Sir Robt. Bradshaigh, 2 Jan. and 25 Feb. 1742-3, Rylands, Crawford mss. He was returned for Wigan as a Tory with the support of Lord Barrymore,3See WIGAN. and on the recommendation of Peter Legh who thought him ‘a good sort of man’.4HMC 14th Rep. III, 491. The 2nd Lord Egmont noted him as ‘a lawyer, I believe to be had’.
As chief justice in Ireland, Clayton earned a reputation for naiveté, but was said to have had ‘no superior as a judge and an honest man’.5E. Elrington Ball, Judges in Ireland, vi. 218. Resigning early in 1770, he died at Adlington on 8 July that year.