a horse (or team of horses) that transported a rider or coach etc from one staging post to another / a hotel that is used as a stop on long journeys / relay (electromechanical device) / relay race

to take over, to handle it from here, to take it from here, to pick up the slack

(figuratively) (transitive with à) to step down in favour of, to stand aside in favour of, to pass the mantle to, to pass the torch on to, to pass the baton on to, to hand the reins to; to hang up one's boots

to leave again / to let again