Try to bring vampires back? (4)
I believe the answer is:
stab
'try' is the definition.
(I know that stab is a type of try)
'vampires back?' is the wordplay.
'vampires' becomes 'bats' (I've seen this in another clue).
'back?' is a reversal indicator (I've seen 'back' mean this).
'bats' reversed gives 'STAB'.
'to bring' acts as a link.
(Other definitions for stab that I've seen before include "shot in the dark?" , "Wound with blade" , "Try - skewer" , "Twinge; guess" , "Knife thrust; attempt" .)