Some prize style that's piquant (5)
I believe the answer is:
zesty
'piquant' is the definition.
(synonyms)
'some prize style that's' is the wordplay.
'some' indicates a hidden word (some of the parts of the word are used).
'ZESTY' is hidden within 'prize style thats'.
(Other definitions for zesty that I've seen before include "Showing spirited enjoyment (like a lemon?)" , "with keenness" , "Full of enthusiasm" , "(Of food) piquant, sharp" , "Showing great excitement and energy" .)