a part to play

a part to play

involvement that is necessary to do something Engineers have an important part to play in any military operation.
See also: part, play
References in classic literature ?
Hence, as the intelligent reader can foresee, this groom has a part to play in the imbroglio.
It was evening, he fancied; he had a part to play that night; it was late, and he must leave home instantly.