Muse about birds (4)

I believe the answer is:

emus

'birds' is the definition.
(emu is a kind of bird)

'muse about' is the wordplay.
'about' is an anagram indicator.
'muse' with letters rearranged gives 'EMUS'.

(Other definitions for emus that I've seen before include "Aussie birds" , "Fast, but not high-fliers" , "Largest native Australian birds" , "Running birds" , "Muse about flightless Australian birds" .)

I've seen this clue in The Mirror.

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