Tinseltown activities in Wales. How bizarre! (7)

I believe the answer is:

showbiz

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'tinseltown activities' is the definition.
I don't know anything about this answer so I cannot judge whether this works.

'in wales how bizarre' is the wordplay.
'in' indicates a hidden word.
'SHOWBIZ' is hidden within 'wales how bizarre'.

Can you help me to learn more?

(Other definitions for showbiz that I've seen before include "Theatre, TV, movies etc" , "Theatre, films, TV etc" , ""Bright lights" entertainment?" , "Entertaining" , "World of bright lights, the theatre etc" .)

I've seen this clue in The Telegraph.

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