domestique
Domestique (noun) means a cyclist who works to support their team's leader, for example by riding ahead to break the wind, rather than trying to win themselves.
Etymology
Borrowed from French domestique ("domestic servant, maid"), which comes from the adjective domestique ("domestic"), from Latin domesticus ("of the house, domestic; familiar; native"), ultimately from domus ("home, house; place of one's birth or residence, native country"). It is a doublet of domestic.