A bishop loves cocktail that's clear (7)
I believe the answer is:
absolve
'clear' is the definition.
(I've seen this in another clue)
'a bishop loves cocktail' is the wordplay.
'bishop' becomes 'B' (chess abbreviation).
'cocktail' indicates an anagram.
'loves' anagrammed gives 'solve'.
'a'+'b'+'solve'='ABSOLVE'
'that's' is the link.
(Other definitions for absolve that I've seen before include "Give pardon" , "Grant remission of sins" , "Free (a person) from guilt" , "Clear of blame or guilt" , "Declare (someone) free of guilt" .)