After 1st of January, work vehicle delivers sacking material (4)
I believe the answer is:
jute
'sacking material' is the definition.
'jute' can be an answer for 'material' (jute is a kind of material). I'm unsure of the 'sacking' bit.
'after 1st of january work vehicle' is the wordplay.
'after' is a charade indicator (letters next to each other).
'1st of january' becomes 'J' (the first letter of the word 'January').
'work vehicle' becomes 'ute' (I've seen this in another clue).
'j' put next to 'ute' is 'JUTE'.
'delivers' is the link.
Can you help me to learn more?
(Other definitions for jute that I've seen before include "Bark fibre used for making sacks" , "Old invader of England" , "Fibre for ropes and mats - member of ancient Germanic tribe" , "Plant - member of a Germanic tribe - fibre" , "Coarse fibre used in making sacks etc" .)