Decade of lifting restrictions after end of war (7)
I believe the answer is:
forties
'decade' is the definition.
(eg the 1940s)
'of lifting restrictions after end of war' is the wordplay.
'lifting' is a reversal indicator.
'restrictions' becomes 'ties'.
'after' is a charade indicator (letters next to each other).
'end of war' becomes 'r' (I've seen this in other clues).
'of' backwards is 'fo'.
'ties' put after 'r' is 'rties'.
'fo'+'rties'='FORTIES'
(Other definitions for forties that I've seen before include "British shipping forecast area" , "The age" , "See 25 Across" .)