Clarke is one of the most exciting talents in county cricket, averaging just under 40. He moved from Worcestershire to Notts at the end of last season in order to play Division One cricket. He started the winter with a century for the England Lions but was dropped from their current tour to India.
Trevor Bayliss, the England coach, bemoaned earlier this week the lack of pressure being put on the Test team by players in county cricket, and there will be batting spots available for the summer, which starts with a four-day Test match against Ireland.
Root and the England management will decide over the next 48 hours whether to make the change to the order for the final Test. The captain moved back to No 4 in the final Test against India last summer and scored a century in that match, following it up two games later with 124 in Kandy as England took a 2-0 series lead over Sri Lanka.
But he is struggling in this series after scores of four, 22, seven and seven against West Indies, dipping his career average below 50.
Root’s record at three is, by his high standards, relatively modest, with an average of 40 from 40 innings with only two centuries.