Crossword Genius

Eccentric owns teeth sharpener (9)

Ross

I believe the answer is:

whetstone

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

'eccentric owns teeth' is the wordplay.
'eccentric' indicates anagramming the letters.
'owns'+'teeth'='ownsteeth'
'ownsteeth' anagrammed gives 'WHETSTONE'.

(Other definitions for whetstone that I've seen before include "Sharpener" , "For sharpening edged tools or knives" .)

I've seen this clue in The Telegraph.
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