Eat up Lucy's chewing gum (10)

I believe the answer is:

eucalyptus

'gum' is the definition.
(I know that eucalyptus is a type of gum)

'eat up lucy's chewing' is the wordplay.
'chewing' indicates anagramming the letters.
'eat'+'up'+'lucys'='eatuplucys'
'eatuplucys' anagrammed gives 'EUCALYPTUS'.

(Other definitions for eucalyptus that I've seen before include "Australasian tree" , "Evergreen tree" , "Australian tree yielding gum and oil" .)

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

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