Sheep taking zig-zag course? (3)

I believe the answer is:

ewe

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'sheep' is the definition.
(I know that sheep can be written as ewe)

'zig-zag course?' is the wordplay.
'zig zag' becomes 'ew' (I can't justify this - if you can you should give a lot more credence to this answer).
'course?' becomes 'e'.
'ew'+'e'='EWE'

'taking' acts as a link.

Can you help me to learn more?

(Other definitions for ewe that I've seen before include "Scottish loch" , "Ram's partner?" , "21a [SHEEP]" , "Wool supplier" , "Female animal" .)

I've seen this clue in The Sun.

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