Be a girl, disguised in nativity play role? (7)

I believe the answer is:

gabriel

I'm a little stuck... Click here to teach me more about this clue!

'nativity play role?' is the definition.
I can't judge whether this definition defines the answer.

'be a girl disguised' is the wordplay.
'disguised' indicates an anagram.
'be'+'a'+'girl'='beagirl'
'beagirl' with letters rearranged gives 'GABRIEL'.

'in' acts as a link.

Can you help me to learn more?

(Other definitions for gabriel that I've seen before include "Trumpet-playing archangel who heralded good news" , "The angel with a trumpet" , "Boy" , "musician" , "Chief guard of Paradise" .)

I've seen this clue in The Times.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.