Anoint a roast of butchered beast (5)

I believe the answer is:

baste

I'm a little stuck... Click here to teach me more about this clue!

'anoint a roast' is the definition.
I can't tell whether this defines the answer.

'butchered beast' is the wordplay.
'butchered' is an anagram indicator (I've seen 'butcher' mean this).
'beast' with letters rearranged gives 'BASTE'.

'of' acts as a link.

Can you help me to learn more?

(Other definitions for baste that I've seen before include "Loosely stitch" , "strike" , "Sew" , "Looking at with interest" , "Abets (anag.)" .)

I've seen this clue in the Sydney Morning Herald.

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