For the conveyance of goods, trains run to time (7)
I believe the answer is:
transit
'for the conveyance' is the definition.
(I've seen this before)
'trains run to time' is the wordplay.
'run' is an anagram indicator.
'to' is a charade indicator (letters next to each other) (I've seen this in other clues).
'time' becomes 't' (abbreviation).
'trains' anagrammed gives 'ransit'.
'ransit' after 't' is 'TRANSIT'.
'of goods' acts as a link.
This may not be right. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for transit that I've seen before include "The act of carrying from one place to another" , "Shipment from A to B" , "Passage of planet across the disc of the sun" , "In migration" , "The process of going or conveying" .)