Potty scientist maybe mistreated rats and mice (8)

I believe the answer is:

ceramist

'potty scientist maybe' is the definition.
(someone who works with ceramics)

'mistreated rats and mice' is the wordplay.
'mistreated' indicates anagramming the letters.
'and' says to put letters next to each other.
'rats' put after 'mice' is 'micerats'.
'micerats' with letters rearranged gives 'CERAMIST'.

(Another definition for ceramist that I've seen is " Potter".)

I've seen this clue in The Telegraph.

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