Ancient Italian six-footer briefly charming (8)
I believe the answer is:
romantic
'charming' is the definition.
'ancient italian six-footer briefly' is the wordplay.
'ancient italian' becomes 'roman' (I've seen this before).
'six-footer' becomes 'tick'.
'briefly' means to remove the last letter.
'tick' with its last letter taken away is 'tic'.
'roman'+'tic'='ROMANTIC'
(Other definitions for romantic that I've seen before include "Amorous, showing loving feeling" , "Passionate" , "Evoking love; post-Classical" , "Visionary" , "Having an idealised view of reality" .)