He studied at Trinity Hall, Cambridge.
He is the author of several books, including How to Label a Goat: the silly Rules and Regulations that are strangling Britain and The Great Before, a novel which satirised the pessimism of the green movement. He is a frequent critic of British government policy, especially on its interventions in the housing market. He established himself as a freelance journalist, with his work appearing in the Daily Telegraph and Sunday Telegraph, the Daily Express, the Daily Mail and Mail on Sunday and The Times, where he frequently writes the Thunderer column.
In 2010, shortly before the general election, he co-wrote, with Neil O"Brien, The Renewal of Government, the manifesto of Policy Exchange, a think tank strongly associated with David Cameron.
However, since then he has shown hostility towards Coalition policies. In a piece in The Times in March 2013, he accused the Chancellor, George Osborne, by means of a plan to underwrite £130 billion of mortgage debt, of forcing the taxpayer to take the same speculative risks which had caused the banking crisis.
In 2012 Clark"s musical Shot at Dawn was performed as a workshop at the Etcetera Theatre in Camden. The musical was a success and was later restaged as a full scale professional production in 2014 at Upstairs at The Gatehouse and The Mumford Theatre, Cambridge.
He also wrote, with Martin Coslett, the The Perfect City, which was performed at the Etcetera Theatre in March 2013.
In 2015 the musical Shot at Dawn was renamed The White Feather and performed at the Union Theatre in Southwark. He lives in Reach, Cambridgeshire.
His work is strongly associated with libertarianism and free market economics, writing the "Banned Wagon" and "Globophobia" columns in The Spectator.
In 2011 he was elected to be a member of the village"s parish council.