Add magnificence to a severe hairstyle (9)

I believe the answer is:

pompadour

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'hairstyle' is the definition.
(pompadour is a kind of hairstyle)

'add magnificence to a severe' is the wordplay.
'add magnificence' becomes 'pomp' (I am not sure about this - if you are sure you should believe this answer much more).
'severe' becomes 'dour' (I've seen this in other clues).
'pomp'+'a'+'dour'='POMPADOUR'

Can you help me to learn more?

(Other definitions for pompadour that I've seen before include "twenty down [HAIRDO]" , "18th century women's hairstyle" , "Hairstyle associated with a mistress of Louis XV" , "Extravagant quiff" , "Lady" .)

I've seen this clue in The Hindu.

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