Crossword Genius

Animal may appear on cue (5)

Ross

I believe the answer is:

ounce

'animal' is the definition.
(I've seen this before)

'may appear on cue' is the wordplay.
'may appear' indicates anagramming the letters (how the letters might appear in a different order).
'on'+'cue'='oncue'
'oncue' with letters rearranged gives 'OUNCE'.

(Other definitions for ounce that I've seen before include "Unit equal to about 28 grams" , "scrap" , "Wild cat or light weight" , "Oz" , "one of several in a pound" .)

I've seen this clue in The Globe and Mail.
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