A grossly distorted list of words (8)
I believe the answer is:
glossary
'list of words' is the definition.
(I've seen this before)
'a grossly distorted' is the wordplay.
'distorted' indicates anagramming the letters.
'a'+'grossly'='agrossly'
'agrossly' is an anagram of 'GLOSSARY'.
(Other definitions for glossary that I've seen before include "set of explanations" , "Specialised dictionary" , "List of terms used in a particular subject" , "Alphabetical list of technical terms" , "where terms are laid out" .)