Lose cool among Hispanics (5)
I believe the answer is:
panic
'lose cool' is the definition.
(I've seen this before)
'among hispanics' is the wordplay.
'among' indicates a hidden word.
'PANIC' can be found hidden inside 'hispanics'.
(Other definitions for panic that I've seen before include "general alarm" , "mass hysteria?" , "Sudden overpowering fear" , "Fearful confusion" , "Mass fear" .)