Take a spin on street that's most lifeless (7)
I believe the answer is:
aridest
'most lifeless' is the definition.
'take a spin on street' is the wordplay.
'take' becomes 'a' (I can't explain this - if you can you should give a lot more credence to this answer).
'a spin' becomes 'ride' (eg in 'go for a spin').
'on street' becomes 'st' (I've seen this in other clues).
'a'+'ride'+'st'='ARIDEST'
'that's' acts as a link.
(Other definitions for aridest that I've seen before include "extremely barren" , "Most uninteresting" .)