Possibly slain with tacks (5)
I believe the answer is:
nails
'tacks' is the definition.
(I've seen this before)
'possibly slain' is the wordplay.
'possibly' indicates anagramming the letters.
'slain' anagrammed gives 'NAILS'.
'with' acts as a link.
(Other definitions for nails that I've seen before include "Horny plates of the digits" , "Slain with metal pins" , "Fixing spikes" , "Metal spikes" , "Fixes" .)