Crossword Genius

Clue for 'baker' slowing down solution? (5,5)

Ross

I believe the answer is:

brake fluid

I'm a little stuck... Click here to teach me more about this clue!

'down solution?' is the definition.
The definition suggests a singular noun which matches the answer.

'clue for baker slowing' is the wordplay.
I cannot quite see how this works, but
an anagram of 'baker' is 'brake' which is within the answer.
The remaining letters 'fluid' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

(Another definition for brake fluid that I've seen is " Liquid used in vehicle".)

I've seen this clue in The Independent.
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