Top speed from Kensington? (3)

I believe the answer is:

ton

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'top speed' is the definition.
'ton' can be an answer for 'speed' (I've seen this before). I'm not certain of the 'top' bit.

'kensington?' is the wordplay.
'TON' is hidden in amongst the letters.
However, I am uncertain how this is indicated.

'from' is the link.

Can you help me to learn more?

(Other definitions for ton that I've seen before include "U nit of weight" , "2240lbs" , "Style" , "Two thousand, two hundred and forty lbs avoirdupois" , "People of fashion" .)

I've seen this clue in the Evening Standard.

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