Starts to pass speed allowed according to brochure (8)
I believe the answer is:
pamphlet
'brochure' is the definition.
(I know that brochure can be written as pamphlet)
'starts to pass speed allowed' is the wordplay.
I cannot quite see how this works, but
'speed' could be 'mph' (miles per hour) and 'mph' is found within the answer.
'allowed' could be 'let' (to let is to allow or permit) and 'let' is found within the answer.
The remaining letters 'pa' 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).
'according to' acts as a link.
Can you help me to learn more?
(Other definitions for pamphlet that I've seen before include "Brochure" , "Tract" , "Small book" , "Small booklet of information" , "Flier" .)