in collar

English

(slang) Synonym of in harness (“employed; at work”)
Antonym: out of collar
- 2010, Patrick Shortle, Full Circle: An Autobiography, page 109:
  […] so the moment the site Foreman at Wheatfield Way gave Frank the nod we were back in collar, it had been well over four months, couldn't wait to get back to earn some money.