1) Any promising beginning 2) Auspicious beginning 3) It follows a taxi 4) Propitious beginning 5) Taxying 6) What a runway produces 7) What the letter f is 
[n] - a racing start in which the contestants are already in full motion when they pass the starting line 2. [n] - a quick and auspicious beginning
running start noun a quick and auspicious beginning
A race that starts with the rider already at top speed. See 200m.
a start, as in sailboat racing, in which the entrants begin moving before reaching the starting line. · a start or beginning of anything, characterized by the participant's vigor and enthusiasm and sometimes by a certain advantage over competitors: She's off to a flying start in her new job.