Colour I call different (5)
I believe the answer is:
lilac
'colour' is the definition.
(lilac is a shade of purple)
'i call different' is the wordplay.
'different' is an anagram indicator (letters placed in a different order).
'i'+'call'='icall'
'icall' is an anagram of 'LILAC'.
(Other definitions for lilac that I've seen before include "Light purple - flowering tree" , "Spiritual knowledge" , "Light-purple" , "Shrub with fragrant purplish or white flowers" , "Fragrant, pale purple flower" .)