Poet, the scoundrel, pinching almost all of another (9)
I believe the answer is:
swinburne
'poet' is the definition.
(19th-century poet Algernon Charles Swinburne)
'the scoundrel pinching almost all of another' is the wordplay.
'the scoundrel' becomes 'swine'.
'pinching' means one lot of letters goes inside another (taking inside).
'almost all of' becomes 'nbu' (I can't justify this - if you can you should give a lot more credence to this answer).
'another' becomes 'r' (I've seen this in other clues).
'nbu'+'r'='nbur'
'swine' enclosing 'nbur' is 'SWINBURNE'.
(Other definitions for swinburne that I've seen before include "Algernon --, English poet" , "Rub in news (anag) - poet" , "Victorian poet" .)