Speed too much and exceed the limit (7)
I believe the answer is:
overrun
'exceed the limit' is the definition.
'overrun' can be an answer for 'exceed' (thesaurus). I'm unsure of the 'the limit' bit.
'speed too much' is the wordplay.
I cannot really see how this works, but
'speed' could be 'run' (running is a kind of speeding) and 'run' is found in the answer.
'too much' could be 'over' (over can mean to too great an extent) and 'over' is located in the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
'and' is the link.
Can you help me to learn more?
(Other definitions for overrun that I've seen before include "Occupy (a place) in large numbers" , "Exceed (cost estimate)" , "Cover - attack" , "attack successfully" , "Exceed (allowed time/cost)" .)