Stretch on grass — it's a faster way to work (3,3)
I believe the answer is:
rat run
'a faster way to work' is the definition.
I don't know anything about this answer so I cannot judge whether this works.
'stretch on grass' is the wordplay.
'stretch' becomes 'run' (run can mean to stretch or extend over an area).
'on' means one lot of letters go next to another.
'grass' becomes 'rat' (both can mean a snitch or informer).
'run' after 'rat' is 'RAT RUN'.
'it's' acts as a link.
Can you help me to learn more?
(Other definitions for rat run that I've seen before include "Side-road used by vehicles to dodge traffic" , "'Busy side-road during rush hour (3,3)'" , "Backstreet heavily used by drivers" , "Busy rush hour side road" , "'Side-road used to dodge traffic (3,3)'" .)