Cleft constructions have long presented an analytical challenge for syntactic theory. This monograph argues that clefts and related constructions cannot be analysed in a straightforwardly compositional manner. Instead, it proposes that the locality conditions on modification (for example by a restrictive relative clause) must be reformulated such that they account for the apparent compositionality of DP-internal modification whilst also permitting discontinuous modification of the type which is independently needed for constructions such as relative clause extraposition. The empirical focus...