Intervene: give drugs to eliminate cold (7)
I believe the answer is:
mediate
'intervene' is the definition.
(to mediate is to intervene between two parties)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for mediate that I've seen before include "ie Tamed (anag.)" , "To referee" , "Help settle a dispute" , "Arbitrate between parties in dispute" , "Act between parties to reconcile differences" .)