be well in

be well in (with)

To have a friendly relationship with a powerful or important person and, usually, benefit from it in some way. Primarily heard in UK, Australia. Now that I'm well in with the CEO, I'm sure I can get you a job at our company.
See also: well
Farlex Dictionary of Idioms.

be ˌwell ˈin (with somebody)

(informal) be good friends with somebody, especially somebody important: She seems to be well in with all the right people.
See also: well
Farlex Partner Idioms Dictionary
See also:
  • be well in (with)
  • chip
  • chips
  • up on (one's) ear
  • Two Bob
  • (as) dead as mutton
  • dead as mutton
  • mutton
  • one of the boys
  • one of the lads