Vivid railway worker's uniform (6)

I believe the answer is:

livery

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'worker's uniform' is the definition.
'livery' can be an answer for 'uniform' (livery is a type of formal uniform). I'm not certain of the 'worker's' bit.

'vivid railway' is the wordplay.
'vivid' becomes 'live' (I've seen this in another clue).
'railway' becomes 'ry' (abbreviation).
'live'+'ry'='LIVERY'

Can you help me to learn more?

(Other definitions for livery that I've seen before include "group of servants" , "Uniform - commercial care of horses" , "Uniform worn by male servants" , "colours" , "The care of horses for pay" .)

I've seen this clue in The Independent.

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