Match up, as two devices

SYNC

Think of what your smartphone does when it updates your calendar or contacts with another device automatically. It’s a short term for keeping things in harmony.

"Match up, as two devices" hints at making two things work together in harmony, like when your phone and laptop update to the same data at the same time. The word sync—short for synchronize—fits perfectly because it literally means to coordinate or align two things. No wordplay here, just a straightforward definition where the clue and answer match up, well, in sync.