Which of the following would be considered a minor defect when conducting a daily inspection?

When conducting a daily inspection, minor defects are generally those that do not significantly hamper the vehicle's safety or function in the short term. Broken clearance lamps can be classified as a minor defect because while they are important for visibility and signaling, the vehicle can still be operated without them, especially during daylight hours. This does not immediately pose a significant safety risk, although it is always advisable to repair such defects at the earliest opportunity.

In contrast, the other options represent issues that can heavily impact the vehicle's safety and operability. A cracked windshield could obstruct the driver's view and may compromise structural integrity in the event of an accident. Worn tires are critical for safe handling and braking, and their condition can directly affect the vehicle's performance and safety. Leaking fluids can signal severe problems with the engine or brakes, leading to potential breakdowns or accidents. Therefore, these issues are not minor and require more urgent attention compared to broken clearance lamps.