Elects to change for the best (6)
I believe the answer is:
select
'the best' is the definition.
(I've seen this before)
'elects to change' is the wordplay.
'to change' indicates anagramming the letters.
'elects' anagrammed gives 'SELECT'.
'for' is the link.
(Other definitions for select that I've seen before include "Excellent" , "Appoint" , "Choose from several" , "best" , "'Choose, pick out (6)'" .)