Language of southern Italy recalled (5)
I believe the answer is:
latin
'language' is the definition.
(Latin is an example)
'of southern italy recalled' is the wordplay.
'of' indicates a hidden word.
'recalled' says the letters should be written backwards.
'nital' is hidden in the letters of 'southern italy'.
'nital' back-to-front is 'LATIN'.
(Other definitions for latin that I've seen before include "Romantic language" , "Language of Cicero" , "Language of the Caesars" , "Hispanic, for example" , "The language of old Rome" .)