April’s harsh twist (6)
I believe the answer is:
spiral
'twist' is the definition.
(thesaurus)
'april's harsh' is the wordplay.
'harsh' is an anagram indicator.
'aprils' with letters rearranged gives 'SPIRAL'.
(Other definitions for spiral that I've seen before include "Shape of a coiled spring" , "Snail shell form" , "Mushroom" , "Shape of a corkscrew or spring" , "Winding curve" .)