In print as 'Sordello', Italian poet (5)
I believe the answer is:
tasso
'italian poet' is the definition.
(I've seen this before)
'in print as sordello' is the wordplay.
'in' indicates a hidden word.
'TASSO' is hidden within 'print as sordello'.
(Other definitions for tasso that I've seen before include "Torquato --, Italian poet of the 16th-century" , "Torquato -, nineteenth century Italian poet" , "Torquato -, sixteenth century Italian poet" .)