Could grinding this pigment be a chore? (5)

I believe the answer is:

ochre

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'could grinding this pigment' is the definition.
'ochre' can be an answer for 'pigment' (ochre is a colour). I'm not certain of the rest of the definition.

'a chore?' is the wordplay.
'chore' can be anagrammed to 'OCHRE'.
However, I'm not sure how this is indicated.

'be' acts as a link.

Can you help me to learn more?

(Other definitions for ochre that I've seen before include "yellowy-orange" , "Earth-coloured pigment" , "yellowish-red" , "Pigment made from clay and iron oxide" , "Golden pigment" .)

I've seen this clue in the Evening Standard.

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