Journey recalled in darker times (4)
I believe the answer is:
trek
'journey' is the definition.
(trek is a kind of journey)
'recalled in darker times' is the wordplay.
'recalled' shows that the letters should be reversed in order.
'in' indicates a hidden word.
'kert' can be found hidden inside 'darker times'.
'kert' reversed gives 'TREK'.
(Other definitions for trek that I've seen before include "Expedition or difficult trip" , "Long walk, expedition" , "Footslog" , "Long and difficult trip" , "Long difficult walk" .)