Divert wagons I had ordered westward ahead of time (8)
I believe the answer is:
distract
'divert wagons' is the definition.
'distract' can be an answer for 'divert' (distracting is a kind of diverting). I am not sure about the 'wagons' bit.
'i had ordered westward ahead of time' is the wordplay.
'had' becomes 'd' (in contractions e.g. 'I'd', 'you'd' etc).
'ordered' indicates anagramming the letters.
'westward' shows that the letters should be reversed in order.
'ahead of' becomes 'carts' (I can't justify this - if you can you should give a lot more credence to this answer).
'time' becomes 't' (abbreviation).
'carts' written backwards gives 'strac'.
'i'+'d'='id'
'id' anagrammed gives 'di'.
'di'+'strac'+'t'='DISTRACT'
Can you help me to learn more?
(Other definitions for distract that I've seen before include "Divert (attention) from something" , "Sidetrack - bewilder" , "amuse" , "Puzzle" , "Subject to diversion" .)