Why so unusually ostentatious? (5)

I believe the answer is:

showy

'ostentatious?' is the definition.
(similar in meaning)

'why so unusually' is the wordplay.
'unusually' is an anagram indicator.
'why'+'so'='whyso'
'whyso' with letters rearranged gives 'SHOWY'.

(Other definitions for showy that I've seen before include "Strikingly bright" , "Strikingly colourful" , "Ostentatious, bright" , "Flamboyant" , "Colourful, ostentatious" .)

I've seen this clue in The Telegraph and The Globe and Mail.

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