Fake doctor passes out? Cop able to revive (7)
I believe the answer is:
placebo
'fake doctor passes out?' is the definition.
I can't tell whether this defines the answer.
'cop able to revive' is the wordplay.
'to revive' is an anagram indicator (I've seen 'revived' mean this (I've seen this in other clues)).
'cop'+'able'='copable'
'copable' anagrammed gives 'PLACEBO'.
Can you help me to learn more?
(Other definitions for placebo that I've seen before include "Inactive treatment" , "Medical treatment whose effect is psychological" , "Medicine working by psychology only" , "Deliberately ineffective drug" , "Medicament often given as a pacifier" .)