Those count somehow as a criterion (10)
I believe the answer is:
touchstone
'a criterion' is the definition.
('touchstone' can be a synonym of 'criterion')
'those count somehow' is the wordplay.
'somehow' indicates anagramming the letters.
'those'+'count'='thosecount'
'thosecount' is an anagram of 'TOUCHSTONE'.
'as' acts as a link.
(Other definitions for touchstone that I've seen before include "Character in As You Like It" , "forest-dweller" , "Standard" , "Shakespearean character" , "Jasper" .)