Crossword Genius

Clocked 100 mph in reverse with surface frozen? (7)

Ross

I believe the answer is:

noticed

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

'clocked 100 mph' is the definition.
'noticed' can be an answer for 'clocked' (I've seen this before). I am unsure of the '100 mph' bit.

'reverse with surface frozen?' is the wordplay.
'reverse' is a reversal indicator.
'with surface' becomes 'ton' (I can't explain this - if you can you should give a lot more credence to this answer).
'frozen?' becomes 'iced' (I've seen this before).
'ton' in reverse letter order is 'not'.
'not'+'iced'='NOTICED'

'in' acts as a link.

Can you help me to learn more?

(Other definitions for noticed that I've seen before include "Perceived or observed" , "Realised" , "Became aware of" , "Detected" , "Seen" .)

I've seen this clue in The Sun.
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