Get into train right away and do something amusing! (9)

I believe the answer is:

entertain

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'do something amusing' is the definition.
I can't judge whether this defines the answer.

'get into train right away' is the wordplay.
'get into' becomes 'enter' (synonyms).
'right' becomes 'r' (common abbreviation).
'away' indicates named letters should be taken away.
'train' with 'r' taken away is 'tain'.
'enter'+'tain'='ENTERTAIN'

'and' is the link.

Can you help me to learn more?

(Other definitions for entertain that I've seen before include "Train teen to amuse" , "nurse" , "Play host to" , "cheer" , "what the party host will do" .)

I've seen this clue in the Sydney Morning Herald.

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