Compare, liken (6)
I believe the answer is:
equate
This clue is a double definition.
'compare' is the first definition.
(I know that compare can be written as equate)
'liken' is the second definition.
(synonyms)
(Other definitions for equate that I've seen before include "Correspond" , "Make or be similar" , "Regard (two things) as the same" , "Consider or describe as similar, equal, or analogous" , "Appear the same" .)