An aid in becoming a saint (5)

I believe the answer is:

aidan

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

'saint' is the definition.
(I've seen this before)

'an aid in becoming a' is the wordplay.
'an aid' can be anagrammed to 'AIDAN'.
Though, I am not clear how this is indicated.

Can you help me to learn more?

(Other definitions for aidan that I've seen before include "Saint associated with Lindisfarne" , "Irish fellow" .)

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.