Slows to trot out port carriers? (9)
I believe the answer is:
decanters
'carriers?' is the definition.
The answer and definition can be both man-made objects as well as being plural nouns.
Maybe there's an association between them I don't understand?
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for decanters that I've seen before include "containers for wine" , "Ardent sec provides wine flasks for table" , "Bottles with stoppers, for serving wine or water" , "Wine is poured into these for use at table" , "The wine bottles have sad centre, oddly" .)