Flatter pair, ever so distorted (10)
I believe the answer is:
overpraise
'flatter' is the definition.
(I've seen this before)
'pair ever so distorted' is the wordplay.
'distorted' indicates anagramming the letters.
'pair'+'ever'+'so'='paireverso'
'paireverso' anagrammed gives 'OVERPRAISE'.
(Other definitions for overpraise that I've seen before include "Gush" , "Express undue approval" , "flatter" .)