Possible Clues:

• Ferocious South American river fish
• Fish pie unfinished - managed to have half
• Literally, ''scissor-fish''
• Feisty fish
• Voracious feeder managed to tuck into a joint that's served up
• Maybe Sam Spade managed a half-laugh for one in a dangerous school
• The cause of angler's foot being in unusual pain on hot afternoon?
• Voracious eater managed to tuck into most of pie and ham
• Ferocious South American fish
• Efficient flesh remover in Pennsylvania State hospital