Cap set eccentrically to display a particular feature (6)
I believe the answer is:
aspect
'a particular feature' is the definition.
(I've seen this before)
'cap set eccentrically' is the wordplay.
'eccentrically' indicates anagramming the letters.
'cap'+'set'='capset'
'capset' anagrammed gives 'ASPECT'.
'to display' is the link.
(Other definitions for aspect that I've seen before include "Face" , "Scene, panorama" , "View - facial expression" , "Visual effect" , "View, outlook" .)