Restless Italian has a go at wacko outside (7)
I believe the answer is:
agitato
'restless' is the definition.
(I've seen this before)
'italian has a go at wacko outside' is the wordplay.
'italian' becomes 'it' (**).
'has' says to put letters next to each other.
'wacko' indicates anagramming the letters.
'outside' is an insertion indicator.
'go'+'at'='goat'
'goat' anagrammed gives 'agto'.
'it'+'a'='ita'
'ita' placed inside 'agto' is 'AGITATO'.
(Other definitions for agitato that I've seen before include "Restless and wild (music)" , "Excited" , "Restlessly (mus.)" , "Excitedly (music)" , "in troubled way" .)