sub out

verb2

1. •
   To replace with a substitute: to substitute (something or someone).

   • It's this single word also that Dickenson's editors subbed out for the 1896 edition of her poems, rendering the line instead, “But sequence ravelled out of reach / like balls upon a floor.” — 2010
2. •
   To hire a subcontractor (to complete a task): to subcontract (something).

   • On the other hand, we sub out all our basement excavation work simply because we found an expert sub who could beat our costs. — 1963