Word of apology, large, not small, one’s articulated? (5)
I believe the answer is:
lorry
'one's articulated?' is the definition.
(as in an articulated lorry)
I don't understand the rest of the clue.
(Other definitions for lorry that I've seen before include "Large truck" , "Industrial vehicle" , "From which stolen goods fall?" , "Transport vehicle" , "HGV" .)