Most sober people you see set limits (8)
I believe the answer is:
sedatest
'most sober' is the definition.
Both the answer and definition are superlative adjectives. Perhaps they are linked in a way I don't understand?
'people you see set limits' is the wordplay.
'people you see' becomes 'sedate' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'limits' says to hollow out the word (remove centre letters).
'set' with its middle removed is 'st'.
'sedate'+'st'='SEDATEST'
Can you help me to learn more?
(Another definition for sedatest that I've seen is " Most cool".)