Period dresser auntie displays (3)
I believe the answer is:
era
'period' is the definition.
(I know that era is a type of period)
'dresser auntie displays' is the wordplay.
'displays' indicates the answer is hidden within the clue (part of the clue displays the answer).
'ERA' can be found hidden inside 'dresser auntie'.
(Other definitions for era that I've seen before include "Stage" , "Specific time" , "Period, age" , "Distinct period in history" , "Distinctive period of time" .)