Attention grabbers safe to assume extremely cushy numbers (9)

I believe the answer is:

cynosures

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'attention grabbers' is the definition.
I know that 'attention' relates to this answer. I also know that both the answer and definition are plural nouns

'safe to assume extremely cushy numbers' is the wordplay.
I cannot quite see how this works, but
'safe' could be 'sure' (I've seen this before) and 'sure' is located in the answer.
'numbers' could be 'nos' (no. is a kind of number) and 'nos' is located in the answer.
This explanation may well be incorrect...

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