Crossword Genius

My pet might be vain (5)

Ross

I believe the answer is:

empty

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

'my pet might be' is the wordplay.
'might be' indicates an anagram.
'my'+'pet'='mypet'
'mypet' with letters rearranged gives 'EMPTY'.

(Other definitions for empty that I've seen before include "Void; vacant" , "vain" , "'. . . . . vessels make the most sound'" , "Arabic quarter" , "Drained glass" .)

I've seen this clue in The Sun.
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