Words such as a bizarre realist pens in chapter (8)
I believe the answer is:
articles
'words' is the definition.
(article is a kind of word)
'a bizarre realist pens in chapter' is the wordplay.
'a bizarre' is an anagram indicator.
'pens in' means one lot of letters goes inside another.
'chapter' becomes 'c' (abbreviation).
'realist' anagrammed gives 'artiles'.
'artiles' placed around 'c' is 'ARTICLES'.
'such as' is the link.
(Other definitions for articles that I've seen before include "Things, objects" , "Items" , "Recitals about particular things" , "Recitals for newspaper pieces" , "Recitals (anag.)" .)