Took flight, like Batman on drugs (7)
I believe the answer is:
escaped
'took flight' is the definition.
(escaping is a kind of taking flight)
'like batman on drugs' is the wordplay.
'like batman' becomes 'caped' (I've seen this in another clue).
'on' is a charade indicator (letters next to each other).
'drugs' becomes 'es' (ecstasy tablets).
'caped' put after 'es' is 'ESCAPED'.
(Other definitions for escaped that I've seen before include "Got away from captors" , "Evaded" , "Got away, broke loose" , "Fled from captivity" , "gone!" .)