Colour in like circle (6)
I believe the answer is:
indigo
'colour' is the definition.
(indigo is a kind of colour)
'in like circle?' is the wordplay.
'like' becomes 'dig' (I've seen this in another clue).
'circle?' becomes 'O' (O is a circle).
'in'+'dig'+'o'='INDIGO'
(Other definitions for indigo that I've seen before include "Sixth rainbow colour" , "Tropical plant" , "Violet-blue dye" , "Blue dyestuff" , "Spectral colour" .)