Bad, as it happens to point the wrong way (4)
I believe the answer is:
evil
'bad' is the definition.
(evil is a kind of bad)
'as it happens to point the wrong way' is the wordplay.
'as it happens' becomes 'live' (as in live television).
'to point the wrong way' says the letters should be written backwards.
'live' back-to-front is 'EVIL'.
(Other definitions for evil that I've seen before include "Profoundly malevolent" , "Unholy" , "Extremely unpleasant" , "A live sort of badness" , "Maleficent" .)