Prankishly teased about being sober (6)

I believe the answer is:

sedate

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

'being sober' is the definition.
('sedate' can be a synonym of 'sober')

'prankishly teased' is the wordplay.
'teased' can be anagrammed to 'SEDATE'.
Though, I'm unsure how this is indicated.

'about' acts as a link.

Can you help me to learn more?

(Other definitions for sedate that I've seen before include "Prim and proper" , "Give calming drug to" , "Calm, sober" , "Tranquilise" , "Not very exciting" .)

I've seen this clue in the Evening Standard.

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