An editor and reader at the publisher Jonathan Cape early in her career, Clapp was a founder of the London Review of Books, where she was assistant editor. She is the author of books about Bruce Chatwin and Angela Carter, and is the literary executor of the estates of both authors.
In December 2013, after 14 years' involvement, Clapp resigned from the judging panel of the Evening Standard Theatre Awards following changes in the voting method of which she disapproved. Allegedly, vote rigging reportedly caused by the use of a secret ballot, rather than the judges making their case to each other as had been the previous practice.
- Bloomsbury author page
- Hyphen Press website - notes about the LRB
- Clapp's page on RCW agency website
- Susannah Clapp "Why I resigned as an Evening Standard theatre awards judge", theguardian.com, 17 December 2013
- Nicola Merrifield "Critics quit Evening Standard Awards panel amid vote-rigging claims", The Stage, 16 December 2013