Seated, suitably sober (6)

I believe the answer is:

sedate

I'm a little stuck... Click here to teach me more about this clue!

'sober' is the definition.
(synonyms)

'seated suitably' is the wordplay.
'seated' can be anagrammed to 'SEDATE'.
Though, I'm not sure how the anagram is indicated.

Can you help me to learn more?

(Other definitions for sedate that I've seen before include "Staid - tranquillise" , "Dignified - staid" , "Composed and staid" , "Leisurely" , "Calm, not flighty" .)

I've seen this clue in the Evening Standard.

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