Saint steps in to heal plague (5)
But I've got no explanation for this one! Could you help me understand?
(Other definitions for curve that I've seen before include "Line that's not straight" , "Shape of 23 down" , "way of learning" , "Bending line" , "Not the straightforward" .)
'plague' is the definition.
(thesaurus)
'saint steps in to heal' is the wordplay.
'saint' becomes 's'.
'steps in' indicates putting letters inside.
'to heal' becomes 'cure' ('cure' can be a synonym of 'heal'**).
's' inserted into 'cure' is 'CURSE'.
(Other definitions for curse that I've seen before include "Wish evil upon" , "Blasphemy" , "It's bad spelling" , "Imprecation or oath" , "Imprecate" .)