Crossword Genius

Cause Tom to cook with a condiment (6,5)

Ross

I believe the answer is:

tomato sauce

'condiment' is the definition.
(I know that tomato sauce is a mother sauce)

'cause tom to cook with a' is the wordplay.
'cook with' indicates an anagram.
'cause'+'tom'+'to'='causetomto'
'causetomto' with its letters mixed up with 'a' can make 'TOMATO SAUCE'.

I've seen this clue in The Mirror.
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