An attractive thing to say (4)

I believe the answer is:

come

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'say' is the definition.
The answer and definition can be both to do with fundamental existence as well as being verbs in their base form.
Maybe there's a link between them I don't understand?

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for come that I've seen before include "' - - fly with me'" , "Draw near" , "See 13 across" , "Turn up" , "Rude aggressive youth" .)

I've seen this clue in the Evening Standard.

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