Covered partly in colour (3)
I believe the answer is:
red
'colour' is the definition.
(I know that red is a type of colour)
'covered partly in' is the wordplay.
'in' indicates a hidden word.
'RED' can be found hidden inside 'covered partly'.
(Other definitions for red that I've seen before include "Looking embarrassed" , "socialist?" , "The colour of the former Russian army" , "Left-wing" , "Colour for danger" .)