Stable's last went on horse wear — bit by bit! (5)
I believe the answer is:
erode
'horse wear bit by bit' is the definition.
I can't judge whether this defines the answer.
'stable's last went on' is the wordplay.
'last' says to take the final letters.
'went on' becomes 'rode' (I've seen this in another clue).
The last letter of 'stable' is 'e'.
'e'+'rode'='ERODE'
Can you help me to learn more?
(Other definitions for erode that I've seen before include "Corrode" , "Abrade" , "'Deteriorate, wear away (5)'" , "Gradually destroy" , "go to pieces!" .)