A selection of medicines soothe cold (7)
I believe the answer is:
iciness
'cold' is the definition.
(I know that iciness is a type of cold)
'a selection of medicines soothe' is the wordplay.
'a selection of' says the answer is hidden in the clue.
'ICINESS' is hidden in the letters of 'medicines soothe'.
(Other definitions for iciness that I've seen before include "Extreme cold" , "State of being very cold or distant" , "unfriendly manner" , "Hostility, unfriendliness" , "Hostile attitude" .)