Being a beast, we go back east (3)

I believe the answer is:

ewe

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

'being a beast we go back east' is the definition.
I can't judge whether this defines the answer.

'we go back east' is the wordplay.
'go back' is a reversal indicator.
'east' becomes 'e' (abbreviation).
'we' written backwards gives 'ew'.
'ew'+'e'='EWE'

Can you help me to learn more?

(Other definitions for ewe that I've seen before include "Lamb's dam" , "Lamb's mother" , "Wool supplier" , "Female bleater" , "Farm animal" .)

I've seen this clue in the Evening Standard.

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