Answer:

kowtows

AnswerCrossword Clue
KOWTOWSActs obsequiously
KOWTOWSShows servility
KOWTOWSFawns
KOWTOWSDefers (to)
KOWTOWSOverdoes deference
KOWTOWSMakes obeisance.
KOWTOWSShows great deference.
KOWTOWSDefers (to).
KOWTOWSBows, in a way.
KOWTOWSIs a kiss-up