Quick return by electric transport (5)

I believe the answer is:
smart
'quick' is the definition.
(I've seen this in another clue)
'return by electric transport' is the wordplay.
'return' says the letters should be written in reverse.
'by' is a charade indicator (letters next to each other).
'electric' becomes 's' (I can't explain this - if you can you should give a lot more credence to this answer).
'transport' becomes 'tram' (method of transport).
's' put after 'tram' is 'trams'.
'trams' written backwards gives 'SMART'.
Can you help me to learn more?
(Other definitions for smart that I've seen before include "Well turned out" , "Spruce; sting" , "Chic - hurt" , "Clever or dapper" , "Clean, tidy; sting" .)
