Damage follows cold spell (5)
I believe the answer is:
charm
'spell' is the definition.
(thesaurus)
'damage follows cold' is the wordplay.
'damage' becomes 'harm' ('harm' can be a synonym of 'damage'**).
'follows' means one lot of letters go next to another.
'cold' becomes 'c' (eg on taps).
'harm' put after 'c' is 'CHARM'.
(Other definitions for charm that I've seen before include "Greatly delight" , "a delightful feature" , "Personal attraction" , "pleasing feature" , "Trinket on a bracelet" .)