[head start] {n.}
1. Начало чего-л. раньше кого-то другого; первенство или преимущество на начальном этапе.
* /The other racers knew they couldn't catch Don if he got too big a head start./* /Joe has a head start. He began to study earlier than we did./
2. Хорошее начало.
* /Let's get a head start in painting the house by getting up early./* /The teacher gave the class a head start on the exercise by telling them the answers to the first two problems./
Ср.: RUNNING START.