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" .)

I've seen this clue in The Times and The Sun.

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