Going on foot, indeed comes to a sticky end! (5)
I believe the answer is:
welly
'to a sticky end' is the definition.
I can't tell 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 am not sure about this - if you are sure you should believe this answer much more).
'indeed' becomes 'well' (I've seen this before).
'y' after 'well' is 'WELLY'.
'comes' acts as a link.
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)" .)