Let her do so at full speed! (3)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
rip
'speed' is the definition.
(thesaurus)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for rip that I've seen before include "Slash" , "The familiar Mr Van Winkle" , "Tearaway" , "death wish" , "Parting words" .)