Reform voters are for values without moderation (9)
I believe the answer is:
overrates
'values without moderation' is the definition.
The definition and answer can be both related to thinking as well as being verbs in their -s form.
Maybe you can see an association between them that I don't see?
'reform voters are' is the wordplay.
'reform' is an anagram indicator (letters in a new form).
'voters'+'are'='votersare'
'votersare' anagrammed gives 'OVERRATES'.
'for' acts as a link.
Can you help me to learn more?
(Other definitions for overrates that I've seen before include "Makes too high an estimate" , "Values too highly" .)