Crossword Genius

Arrives to take refreshment after the performance (5,2)

Ross

I believe the answer is:

shows up

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'arrives' is the definition.
Although both the answer and definition are verbs in their -s form, I cannot see how one could define the other.

'refreshment after the performance' is the wordplay.
'refreshment' becomes 'sup' (I am not sure about this - if you are sure you should believe this answer much more).
'after' says to put letters next to each other.
'the performance' becomes 'show' (eg a theatrical show).
'sup' after 'show' is 'SHOWS UP'.

'to take' is the link.

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I've seen this clue in the Evening Standard.
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