An allusion is a subtle reference or mention of something without explicitly stating it. It is a way to indirectly refer to something else that the audience is expected to know about. Full definition
The series Quint has in mind is the series of allusions in Milton's epic to the flight and fall of Icarus. (firstthings.com)
i find it amazing that they brush Dr Carlin off as if he were some office boy with allusions of grandure. (jennifermarohasy.com)
all that we then have is a series of historical allusions in some of the events recorded in the gospel, especially in the passion narrative, with little or no teaching material involved. (religion-online.org)