Compare (8)
'compare' is the definition.
(I know that compare can be written as liken)
This is the entire clue.
(Other definitions for liken that I've seen before include "Represent as similar" , "Compare" , "Point out the resemblance (to)" , "Equate" .)
'compare' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for contrast that I've seen before include "No tracts by way of difference" , "Degree of difference between tones or colours" , "Distinction" , "Disparity" , "Degree of difference in colour tones" .)