A little innocent to have little moustache rubbed (6)

I believe the answer is:

cherub

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

'a little innocent' is the definition.
(I've seen this in another clue)

'have little moustache rubbed' is the wordplay.
'CHERUB' is hidden in amongst the letters.
However, I'm not sure how the hidden word is indicated.

'to' acts as a link.

Can you help me to learn more?

(Other definitions for cherub that I've seen before include "innocent-looking child" , "A heavenly winged babe" , "Innocent youngster" , "innocent young thing" , "goody-goody?" .)

I've seen this clue in the Sydney Morning Herald.

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