Crossword Genius

Took the attitude that dopes shouldn't be so silly (5)

Ross

I believe the answer is:

posed

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'took the attitude' is the definition.
The definition and answer can be both to do with communicating as well as being past participle verbs.
Maybe they are linked in a way I don't understand?

'dopes shouldn't be so silly' is the wordplay.
'dopes' can be anagrammed to 'POSED'.
But, I am unsure how this is indicated.

'that' is the link.

Can you help me to learn more?

(Other definitions for posed that I've seen before include "Presented (a problem)" , "Presented (a question)" , "Took a stance" , "Modelled" , "Sat (for artist)" .)

I've seen this clue in the Evening Standard.
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