Trucker loading tonnes into ship after moving cover (8)
I believe the answer is:
teamster
'trucker' is the definition.
(I know that trucker can be written as teamster)
'into ship after moving cover' is the wordplay.
'into' is an insertion indicator.
'ship' becomes 'tester' (I can't justify this - if you can you should give a lot more credence to this answer).
'cover' suggests taking the first letters (in a down clue, the letter covering the word).
The first letters of 'after moving' is 'am'.
'tester' going around 'am' is 'TEAMSTER'.
'loading tonnes' is the link.
This may not be correct. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for teamster that I've seen before include "truck-driver" , "One drives" , "Truck driver" , "US lorry driver" .)