Archangel (7)
'archangel' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for gabriel that I've seen before include "Trumpet-playing archangel who heralded good news" , "The angel with a trumpet" , "Archangel and messenger of God" , "Chief guard of Paradise" , "Boy" .)
(Other definitions for michael that I've seen before include "- Faraday, English chemist/physicist" , "- Faraday, English scientist" , "George -, pop singer" , "1987 Best Actor Oscar winner for 'Wall Street'" , "Man" .)