Crossword Genius

Increase the rate (10)

Ross

I think it could be either:

Which length description are you looking for?:

10

5,2

speed up

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'increase the rate' is the definition.
The answer and definition are not the same part of speech.

'increase the rate' is the wordplay.
I cannot really see how this works, but
'increase' could be 'up' (upping is a kind of increasing) and 'up' is located in the answer.
'rate' could be 'speed' (speed is a kind of rate) and 'speed' is found within the answer.
This accounts for all the letters.
This may be the basis of clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for speed up that I've seen before include "career" , "put foot down" , "Get faster" , "Work faster" , "go faster!" .)

I've seen this clue in The Globe and Mail.
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