Like canned sardines (4)
I believe the answer is:
oily
'like canned sardines' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for oily that I've seen before include "Smoothly ingratiating" , "Unctuous" , "Viscous" , "Oleaginous" , "Smooth; like lubricant" .)