In colour, a bit of a regular visitor (7)
I believe the answer is:
habitue
'a regular visitor' is the definition.
(I've seen this in another clue)
'in colour a bit' is the wordplay.
'in' indicates putting letters inside.
'colour' becomes 'hue' (I've seen this before).
'a'+'bit'='abit'
'hue' placed around 'abit' is 'HABITUE'.
'of' acts as a link.
(Other definitions for habitue that I've seen before include "Regular attendant" , "Person who visits a place frequently, may live there" , "Regular customer" , "Frequent visitor to a place" , "Regular visitor (to place)" .)