An official reception means work (8)

I believe the answer is:

function

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This might be a double definition.

'an official reception' is the first definition.
'function' can be an answer for 'reception' (thesaurus). I'm not sure about the 'an official' bit.

'work' is the second definition.
(I know that work can be written as function)

'means' is the link.

Can you help me to learn more?

(Other definitions for function that I've seen before include "An official ceremony" , "Special task - role" , "social gathering" , "Operate" , "Formal social event" .)

I've seen this clue in the Evening Standard.

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