Novice protects her heavenly child (6)

I believe the answer is:

cherub

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'heavenly child' is the definition.
'cherub' can be an answer for 'child' (cherub is a kind of child). I'm not certain of the 'heavenly' bit.

'novice protects her' is the wordplay.
'novice' becomes 'cub' (cub is a kind of novice).
'protects' means one lot of letters goes inside another (outer letters protect inside letters).
'cub' placed around 'her' is 'CHERUB'.

Can you help me to learn more?

(Other definitions for cherub that I've seen before include "A chubby infant with wings" , "innocent young thing" , "Sweet little baby" , "Innocent youngster" , "Member of heavenly group" .)

I've seen this clue in The Sun.

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