It's silly going back to the end of the road (4)
I believe the answer is:
daft
'it's silly' is the definition.
(I've seen this in other clues)
'going back to the end of the road' is the wordplay.
'going back' becomes 'aft' (associated in meaning. I am not sure about the 'going' bit.).
'to' means one lot of letters go next to another (I've seen this in other clues).
'the end of the' says to take the final letters.
The final letter of 'road' is 'd'.
'aft' after 'd' is 'DAFT'.
Can you help me to learn more?
(Other definitions for daft that I've seen before include "Potty" , "Half-witted" , "like a brush?" , "Scatty" , "Informally silly or foolish" .)