Quick diet a man ordered (8)
I believe the answer is:
animated
'quick' is the definition.
(thesaurus)
'diet a man ordered' is the wordplay.
'ordered' indicates an anagram.
'diet'+'a'+'man'='dietaman'
'dietaman' is an anagram of 'ANIMATED'.
(Other definitions for animated that I've seen before include "Interesting and lively - as a cartoon film is" , "Mandate I confer on the lively" , "Lively - brought to life by Disney?" , "Diamante (anag)" , "Vibrant" .)