Dread uprising in Cisplatine War (3)
I believe the answer is:
awe
'dread' is the definition.
(awe can mean a feeling of dread)
'uprising in cisplatine war' is the wordplay.
'uprising' shows that the letters should be reversed in order.
'in' indicates a hidden word.
'ewa' can be found hidden inside 'cisplatine war'.
'ewa' in reverse letter order is 'AWE'.
(Other definitions for awe that I've seen before include "Amazed wonder" , "viewed with apprehension" , "Profound respect" , "Reverential respect" , "Reverent fear" .)