Evasive, elusive (8)
I believe the answer is:
slippery
I believe this clue is a double definition.
'evasive' is the first definition.
(I've seen this before)
'elusive' is the second definition.
(I've seen this in another clue)
(Other definitions for slippery that I've seen before include "Hard to grasp or walk on" , "Hard to grasp, like an eel" , "found difficult to get hold of" , "Descent into sin in this sort of slope" , "Not to be trusted" .)