Sign of emotion predator faked (8)
I believe the answer is:
teardrop
'sign of emotion' is the definition.
'predator faked' is the wordplay.
'faked' is an anagram indicator (I've seen 'faking' mean this).
'predator' anagrammed gives 'TEARDROP'.
(Other definitions for teardrop that I've seen before include "Predator (anag.)" , "Mournful globule from predator" , "Result of Scots greeting" , "Visible result of crying" , "Globule of moisture indicating distress" .)