Odd stone cooker (7)
I believe the answer is:
strange
'odd' is the definition.
(thesaurus)
'stone cooker' is the wordplay.
'stone' becomes 'st'.
'cooker' becomes 'range' (I've seen this in other clues).
'st'+'range'='STRANGE'
(Other definitions for strange that I've seen before include "Irregular" , "Odd kind of garnets" , "Singular" , "Bizarre" , "as quarks in certain hadrons" .)