Agitated French caper (7)
I believe the answer is:
frantic
'agitated' is the definition.
('frantic' can be similar in meaning to 'agitated')
'french caper' is the wordplay.
'french' becomes 'fr'.
'caper' becomes 'antic' ('antic' can be a synonym of 'caper').
'fr'+'antic'='FRANTIC'
(Other definitions for frantic that I've seen before include "Desperate with worry" , "At the end of one's tether" , "Deranged by fear, worry etc" , "Frenetic" , "Wild - frenzied" .)