By the time of his father’s death Clifford was the eldest surviving son. Interestingly, when Anthony Ashley Cooper, earl of Shaftesbury drew up his analysis of peers in 1677-8, Clifford was classed as underage, but not as a papist. Unable to take his seat in the Lords because of the terms of the Test Act, he nevertheless entered into public life. On 10 Feb. 1685 he may have been the Lord Clifford who was thought a possible lord chamberlain to the new queen.
The Revolution of 1688 ended Clifford’s public career. It was reported in December 1688, that he had lost £8,000 ‘by the injuries offered to his house’ in Devon, ‘being a Papist’.
More trouble was in store for Clifford in May 1692 when Jonathan Trelawny, bishop of Exeter, seized a letter ‘directed to a servant’ of Clifford’s with one enclosed to ‘Bishop Gifford’.
Clifford did not sign the Association in 1696. However, he attended a meeting of Catholics in London in December 1697, in order to draw up an address of congratulation to William III on the peace and praying for his protection, but the meeting ‘broke up abruptly, unable to agree upon a form’.
