Different extremes in suspense story (9)
I believe the answer is:
separable
'different extremes in' is the definition.
Both the answer and definition are adjectives. Perhaps you can see an association between them that I can't see?
'suspense story' is the wordplay.
'suspense' becomes 'se' (I am not sure about this - if you are sure you should believe this answer much more).
'story' becomes 'parable' (parable is a kind of story).
'se'+'parable'='SEPARABLE'
Can you help me to learn more?
(Other definitions for separable that I've seen before include "not permanently joined together?" , "That may be disjoined" .)