Honour covered up by genteel bonnets (7)

I believe the answer is:

ennoble

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'honour' is the definition.
(ennobling is a kind of honouring)

'covered up by genteel bonnets' is the wordplay.
'ENNOBLE' is hidden back-to-front within the letters.
However, I am not sure how the hidden word is indicated.

Can you help me to learn more?

(Other definitions for ennoble that I've seen before include "Bestow high rank upon" , "Elevate to the aristocracy" , "Exalt" , "Elevate to knighthood" , "Raise to greater dignity" .)

I've seen this clue in The Times.

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