Comfort from Erasure's medley (8)
I believe the answer is:
reassure
'comfort' is the definition.
(thesaurus)
'erasure's medley' is the wordplay.
'medley' indicates anagramming the letters.
'erasures' anagrammed gives 'REASSURE'.
'from' is the link.
(Other definitions for reassure that I've seen before include "calm fears" , "Remove doubts about erasures" , "Remove anxiety over erasures" , "Buoy up" , "Relieve (someone) of anxieties" .)