Accomplices in case? Scores I suspect (11)
I believe the answer is:
accessories
'accomplices' is the definition.
('accessory' can be a synonym of 'accomplice')
'case? scores i suspect' is the wordplay.
'suspect' indicates anagramming the letters.
'case'+'scores'+'i'='casescoresi'
'casescoresi' anagrammed gives 'ACCESSORIES'.
'in' acts as a link.
(Other definitions for accessories that I've seen before include "Articles worn to complement a garment" , "Accomplices" , "Associates" , "extras" , "Add-ons" .)