Crossword Genius

Guarantees certain bonds (8)

Ross

I believe the answer is:

sureties

'guarantees' is the definition.
(surety is a kind of guarantee)

'certain bonds' is the wordplay.
'certain' becomes 'sure' ('sure' can be a synonym of 'certain').
'bonds' becomes 'ties' (I've seen this in other clues).
'sure'+'ties'='SURETIES'

(Other definitions for sureties that I've seen before include "Assets that a creditor can claim from a defaulter" , "Guarantees for user site" .)

I've seen this clue in The Guardian and The Telegraph.
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