Possible Clues:

• Poet, second Graves, maybe, eclipsing Smart
• Hell of a problem overwhelms smart poet
• Son to feel enthusiasm dipping into Graves, say, the poet
• Rub in news (anag) - poet
• Victorian poet portrays animals round stream
• Victorian poet has pigs drinking in Northern stream
• Poet's son in hock, perhaps, to brand
• English poet and Scottish one endlessly feeding pigs
• Algernon —, English poet
• Poet, the scoundrel, pinching almost all of another