Jeffrey Ovid "Jeff" Clyne (29 January 1937 – 16 November 2009) was a British jazz bassist (playing both bass guitar and double bass).
He worked with Tubby Hayes and Ronnie Scott in their group the Jazz Couriers for a year from 1958 and was part of the group of musicians who opened Ronnie Scott's Jazz Club in November 1959. He was a regular member of Hayes' groups from 1961.
Clyne accompanied Blossom Dearie, Stan Tracey (on his Under Milk Wood album), Ian Carr, Gordon Beck (on Experiments With Pops, with John McLaughlin), Dudley Moore, Zoot Sims, Norma Winstone, John Burch and Marion Montgomery. He was a member of Nucleus, Isotope, Gilgamesh, Giles Farnaby's Dream Band and Turning Point in the 1970s. He often worked with drummer Trevor Tomkins.
Clyne died on 16 November 2009 from a heart attack.