Brittle (5)
'brittle' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for crisp that I've seen before include "brief" , "Snappy" , "Fresh and bracing" , "food in packet" , "Firm and fresh or easily crumbled" .)
'brittle' is the definition.
(thesaurus)
This is all the clue.
(Other definitions for frangible that I've seen before include "Fragile, brittle" , "Easily broken -- gerbil fan (anag)" .)