Member of girl group on track as support for Stevie Wonder? (5,3)
I believe the answer is:
guide dog
'support for stevie wonder?' is the definition.
(support for a blind person eg Stevie Wonder)
'member of girl group on track' is the wordplay.
'member of girl group' becomes 'guide' (a Girl Guide).
'on' is a charade indicator (letters next to each other).
'track' becomes 'dog' (synonyms).
'guide'+'dog'='GUIDE DOG'
'as' acts as a link.
(Other definitions for guide dog that I've seen before include "Blind person's helper" , "Aid for the visually impaired" , "Only animal allowed in?" , "Blind person's aid" , "blind leader" .)