Limits providing sure sign (10)

I believe the answer is:

boundaries

'limits' is the definition.
('boundary' can be a synonym of 'limit')

'sure sign' is the wordplay.
'sure' becomes 'bound' (synonyms).
'sign' becomes 'Aries' (star sign).
'bound'+'aries'='BOUNDARIES'

'providing' acts as a link.

(Other definitions for boundaries that I've seen before include "Borders" , "Limits" .)

I've seen this clue in The Daily Express.

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