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I end reversing loco — as do they? (6,7)

Ross

I believe the answer is:

engine drivers

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'do they?' is the definition.
I know nothing about this answer so I can't tell whether it can be defined by this definition.

'i end reversing loco' is the wordplay.
'i end reversing' anagrams to 'ENGINE-DRIVERS'.
Though, I am unsure how this is indicated.

'as' is the link.

Can you help me to learn more?

(Another definition for engine drivers that I've seen is " People in charge of transport".)

I've seen this clue in The Times.
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