Agitated euro fan is wicked (9)
I believe the answer is:
nefarious
'wicked' is the definition.
(similar in meaning)
'agitated euro fan is' is the wordplay.
'agitated' indicates an anagram.
'euro'+'fan'+'is'='eurofanis'
'eurofanis' anagrammed gives 'NEFARIOUS'.
(Other definitions for nefarious that I've seen before include "Wicked, criminal" , "Very bad" , "immoral?" , "Villainous" , "Extremely wicked" .)