2160010 jmdict A [id=2271906]
いい線；良い線；好い線[rK]
いいせん
[1][exp,n]
  [note="usu. as いい線(を)いく, いい線(を)いってる, etc."]
  (on the) right track; (on the) right lines
  [see=2394060・いい線いってる[1]]