The truth about wildest Italy (7)
I believe the answer is:
reality
'the truth' is the definition.
(I've seen this before)
'about wildest italy' is the wordplay.
'about' becomes 're' ('re' means regarding or about).
'wildest' is an anagram indicator (I've seen 'wilder' mean this).
'italy' with letters rearranged gives 'ality'.
're'+'ality'='REALITY'
(Other definitions for reality that I've seen before include "The actual state of things" , "The world as it is" , "Verisimilitude" , "All that is actual and not imaginary" , "Fact" .)