"Gathering speed, the train trundled on" is hackneyed (10)

I believe the answer is:

pedestrian

I'm a little stuck... Click here to teach me more about this clue!

'is hackneyed' is the definition.
(thesaurus)

'gathering speed the train' is the wordplay.
'gathering' indicates anagramming the letters (letters gathered in a new way).
'speed'+'train'='speedtrain'
'speedtrain' with letters rearranged gives 'PEDESTRIAN'.

'trundled on' is the link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.

Can you help me to learn more?

(Other definitions for pedestrian that I've seen before include "Dull, uninspired" , "Unimaginative" , "wearer of leather?" , "Unexciting" , "chap on zebra could be?" .)

I've seen this clue in the Evening Standard.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.