Going on foot, indeed comes to a sticky end! (5)
I believe the answer is:
welly
'comes to a sticky end' is the definition.
I can't judge whether this defines the answer.
'going on foot indeed' is the wordplay.
'going on' means one lot of letters go next to another.
'foot' becomes 'y' (I can't justify this - if you can you should believe this answer much more).
'indeed' becomes 'well' (I've seen this before).
'y' after 'well' is 'WELLY'.
Can you help me to learn more?
(Other definitions for welly that I've seen before include "wet-weather gear" , "showing great commitment" , "Oomph" , "Boot (informal)" , "Power (inf)" .)