Popular sort of spider is exceptional (8)
I believe the answer is:
inspired
'exceptional' is the definition.
Both the answer and definition are adjectives. Perhaps there's an association between them I don't understand?
'popular sort of spider' is the wordplay.
'popular' becomes 'in' ('in' can mean trendy).
'sort of' indicates anagramming the letters.
'spider' is an anagram of 'spired'.
'in'+'spired'='INSPIRED'
'is' is the link.
Can you help me to learn more?
(Other definitions for inspired that I've seen before include "Divinely influenced" , "Stirred to action, fired up" , "prompted" , "Drew in" , "Animated with ideas" .)