Message from public transport: 'Introduction of electronic support needed' (8)

I believe the answer is:

'message' is the definition.
(I know that telegram is a type of message)

'public transport introduction of electronic support needed' is the wordplay.
'public transport' becomes 'tram' (type of public transport).
'introduction of' indicates taking the first letters.
'support' becomes 'leg' (leg is a kind of support).
'needed' means one lot of letters goes inside another.
The initial letter of 'electronic' is 'e'.
'e'+'leg'='eleg'
'tram' enclosing 'eleg' is 'TELEGRAM'.

'from' acts as a link.

(Other definitions for telegram that I've seen before include "Message sent by wire" , "Pre-1980s electronic message" , "cable" , "Now obsolete communication over a wire" , "Electric message" .)

I've seen this clue in The Guardian.

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