Nob accommodating old Italian poet (7)
I believe the answer is:
ariosto
'italian poet' is the definition.
(I've seen this before)
'nob accommodating old' is the wordplay.
'nob' becomes 'aristo' (I've seen this before).
'accommodating' means one lot of letters goes inside another.
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'aristo' enclosing 'o' is 'ARIOSTO'.
(Other definitions for ariosto that I've seen before include "Poet of Orlando Furioso" , "Italian Renaissance poet" , "Author of Orlando Furioso" , "His hero was furious" .)