She mixes oils (4)

I believe the answer is:

lois

'she' is the definition.

'mixes oils' is the wordplay.
'mixes' indicates anagramming the letters.
'oils' is an anagram of 'LOIS'.

(Other definitions for lois that I've seen before include "- Lane, Daily Planet reporter" , "- Lane (Superman's girl)" , "Woman" , "-- Lane, 'Superman' character" , "- Lane, girlfriend of Superman" .)

I've seen this clue in the Evening Standard.

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