Prickly sort to be evasive with swine (8)
I believe the answer is:
hedgehog
'prickly sort' is the definition.
(hedgehogs are prickly)
'be evasive with swine' is the wordplay.
'be evasive' becomes 'hedge' (as in hedging when giving an answer).
'with' is a charade indicator (letters next to each other).
'swine' becomes 'hog' (hog is a kind of swine).
'hedge'+'hog'='HEDGEHOG'
'to' acts as a link.
(Other definitions for hedgehog that I've seen before include "Porcupine" , "Rodent with sharp bristles and fur" , "Small prickly insectivore" , "Prickly mammal" , "Nocturnal insectivore" .)