It's earthy and colourful (5)

I believe the answer is:

ochre

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'colourful' is the definition.
Both the definition and answer are adjectives. Maybe they are linked in a way I don't understand?

I don't understand the rest of the clue.

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(Other definitions for ochre that I've seen before include "Chore using pale brownish colour (5)" , "Earth-coloured pigment" , "Yellow/brown pigment" , "An orangey pigment" , "Brown" .)

I've seen this clue in the Evening Standard.

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