Give dodgy antidote? Forget it (6)
I believe the answer is:
donate
'give' is the definition.
(donating is a kind of giving)
'dodgy antidote? forget it' is the wordplay.
'dodgy' indicates an anagram (a dodgy or wrong order of the letters).
'forget' indicates named letters should be taken away.
'antidote' with 'it' taken away is 'andote'.
'andote' anagrammed gives 'DONATE'.
(Other definitions for donate that I've seen before include "Give charitably - say blood" , "Give as a gift as to charity" , "Give freely, maybe blood" , "Give to a charity or good cause" , "give in kindness" .)