Slows down, removing top garden implements (5)
I believe the answer is:
rakes
'garden implements' is the definition.
(I've seen this before)
'slows down removing top' is the wordplay.
'slows down' becomes 'brakes' (I've seen this before).
'removing top' means to remove the first letter (I've seen 'removes top' mean this).
'brakes' with its initial letter taken off is 'RAKES'.
(Other definitions for rakes that I've seen before include "men to be debauched" , "men who are dissipated" , "Has an inclination" , "Collects leaves - leaf collectors" , "degenerates" .)