Collect truck (4-2)
I believe the answer is:
pick-up
This clue is a double definition.
'collect' is the first definition.
('pick up' can be a synonym of 'collect')
'truck' is the second definition.
(pick-up is a kind of truck)
(Other definitions for pick-up that I've seen before include "Small truck or lady met informally" , "Improve, increase" , "Small van" , "Light open lorry with low sides and a tailboard" , "Collect; casually acquire" .)