Clifton belonged to an old Nottinghamshire family, who had frequently represented the county and East Retford. In 1727 he announced his intention of standing, with combined Whig and Tory support, both for the county and for Retford against the sitting Members, but gave up the county on the understanding that he would be brought in on a compromise for Retford.
At a contested election at Retford in 1741, Clifton, who had recently re-married, was assisted by his mother-in-law, Lady Lombe. She told Newcastle’s agent that
had she but known Sir Robert Clifton but two years sooner, your Grace would not have refused him your Grace’s interest at Retford or elsewhere for that he is now as great a Whig as any in the world and he shall be so for that he would be ruled by her and I believe everybody knows her ladyship is very staunch to the good cause.
Though she gave £40 or £50 for a vote and declared that Clifton should not lose ‘for a thousand pounds more’,
In 1746 the 1st Lord Egmont noted:
Sir Robert Clifton, who was ... imprisoned for debt, I see abroad again. He married the daughter of the Lady Lombe and, as the report goes, separated himself from her to lie with the mother freely. This unworthy old lady is as extravagant as he is, and both contributed to beggar each other. He has taken home his wife again, so that ’tis to be hoped he repents himself of his errors.
HMC Egmont Diary, iii. 317.
In 1747 Clifton took soundings at Retford but received discouraging replies.
