Make Leo Benn Sir Leo Benn? (7)

I believe the answer is:

ennoble

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'sir leo benn?' is the definition.
I can't tell whether this defines the answer.

'make leo benn' is the wordplay.
'make' indicates anagramming the letters.
'leo'+'benn'='leobenn'
'leobenn' anagrammed gives 'ENNOBLE'.

Can you help me to learn more?

(Other definitions for ennoble that I've seen before include "Dignify" , "Give rank or title to (someone)" , "Elevate; honour" , "Raise to the aristocracy" , "Create" .)

I've seen this clue in the Evening Standard.

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