Sheep boxed by boomer in Oz (6)

I believe the answer is:

merino

'sheep' is the definition.
(breed of sheep)

'boxed by boomer in oz' is the wordplay.
'boxed' indicates the answer is hidden within the clue (box can mean to contain).
'MERINO' can be found hidden inside 'by boomer in oz'.

(Other definitions for merino that I've seen before include "Sheep from Spain with a heavy quality fleece" , "Sheep with fine soft wool" , "Spanish breed of sheep with high quality fleece" , "Long-haired sheep" , "Type of sheep" .)

I've seen this clue in The Independent.

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