Come in with article in container to amuse (9)

I believe the answer is:

entertain

I'm a little stuck... Click here to teach me more about this clue!

'to amuse' is the definition.
(I've seen this before)

'come in with article in container' is the wordplay.
'come in' becomes 'enter' (synonyms).
'with' is an insertion indicator.
'article in' becomes 'a' (the indefinite article in English. I am not sure about the 'in' bit.).
'container' becomes 'tin' (tin is a kind of container).
'a' placed inside 'tin' is 'tain'.
'enter'+'tain'='ENTERTAIN'

Can you help me to learn more?

(Other definitions for entertain that I've seen before include "Amuse; host" , "harbour" , "Create a diversion" , "can be amusing" , "Provide amusement" .)

I've seen this clue in The Irish Independent.

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