Glamorous former lover with old nervous habit (6)
I believe the answer is:
Here is my best explanation:
'glamorous' is the definition.
'former lover with old nervous habit' is the wordplay.
'former lover' becomes 'ex'.
'with' means one lot of letters go next to another.
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'nervous habit' becomes 'tic' (I've seen this before).
(Other definitions for exotic that I've seen before include "Interestingly different or strange", "Colourful and glamorous from abroad", "Foreign; strikingly colourful", "From far abroad", "Foreign, strange or exciting", "type of dancer?", "Strikingly strange or unusual", "Foreign-looking", "From a foreign place" and "Very foreign".)