Strange or unusual (6)
I believe the answer is:
exotic
This clue is a double definition.
'strange' is the first definition.
(synonyms)
'unusual' is the second definition.
(I've seen this before)
(Other definitions for exotic that I've seen before include "Foreign; strikingly colourful" , "Strikingly different/colourful" , "Romantically strange" , "From far abroad" , "Unusual and showy" .)