Here's a breakdown:
* "Arguably": This word acknowledges that this is a matter of opinion. It suggests that while some might disagree, the speaker believes this event to be a high point for Queen.
* "Queen's finest hour": This is a metaphorical phrase often used to describe a moment of great triumph or achievement. In this context, it's referring to a specific event, performance, or even a period of time that showcased Queen's talent, skill, and impact at their absolute peak.
This phrase could be used to refer to:
* A specific concert: Perhaps a legendary live performance that is considered by many to be their greatest show ever.
* A particular album release: This could be an album that achieved critical acclaim, commercial success, or both, marking a significant turning point in their career.
* A specific event: This could be a significant moment in their history, such as winning a major award or performing at a prestigious event.
Without context, it's impossible to know exactly what event the phrase is referring to. However, it is clear that it's meant to evoke a feeling of admiration and respect for Queen's accomplishments at their most impressive.