In a terrible rage for a time (3)
I believe the answer is:
era
'a time' is the definition.
(era is a kind of time)
'in a terrible rage for' is the wordplay.
'in' indicates a hidden word.
'ERA' can be found hidden inside 'terrible rage for'.
(Other definitions for era that I've seen before include "quite some time" , "A particular period of time" , "generation, maybe" , "Age of importance" , "Long historic period" .)