Periods (5)
'periods' is the definition.
(time is a kind of period)
This is the entire clue.
(Other definitions for times that I've seen before include "''For the ..., they are a'changin'''(Bob Dylan)" , "Occasions; multiplied by" , "operator" , "Thunderer?" , "Paper" .)
'periods' is the definition.
(era is a kind of period)
This is all the clue.
(Other definitions for eras that I've seen before include "Periods, ages" , "typeface" , "Epochs" , "At least two times" , "Long and distinct periods of history" .)