Bizarre old books with one chapter (6)
I believe the answer is:
Here is my best explanation:
'bizarre' is the definition.
(I've seen this before)
'old books with one chapter' is the wordplay.
'old' becomes 'ex'.
'books' becomes 'ot' (Old Testament).
'with' is a charade indicator (letters next to each other).
'one' becomes 'i' (Roman numeral).
'chapter' becomes 'c'.
(Other definitions for exotic that I've seen before include "Strikingly different/colourful", "Very foreign", "Colourful or unusual, perhaps from abroad", "Foreign; strikingly colourful", "Strange, rare or foreign", "Unusual, foreign", "Glamorous or strange from abroad", "Foreign; glamorous", "Foreign-looking" and "Weird; strange".)