first-string
1. [ adjective ] of members of a team; not substitutes
Related terms: regular
2. [ adjective ] of the regular members of a team; not substitutes
Examples:

"first-string players"

Related terms: primary
Similar spelling:   first_reading
  First_Reich
  first_strike
  first-nighter
  firstborn
  first-year
  first-rater
  first-class
  First_State
  first_gear
  first_principle
  first_language
  first_light
  first_grade