Mclaren is a proper noun, most recognizably a surname and brand name. In general usage it refers to the motor company founded by Bruce McLaren, and by extension to people or products bearing the name. The pronunciation emphasizes the second syllable, yielding a two-stress pattern that highlights the distinctive 'klær' portion rather than the initial schwa. Overall, it is a non-lexical, brand-specific term inherited from a personal name.
Full pronunciation guide