Crossword Genius

European knights boasted endlessly about love and honour (7)

Ross

I believe the answer is:

ennoble

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

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for ennoble that I've seen before include "Lend greater dignity to" , "Create" , "Glorify - confer honour upon" , "Glorify - raise to the peerage" , "Elevate with a title" .)

I've seen this clue in The Telegraph.
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