Crossword Genius

Certain (8)

Ross

There are a few possibilities for this:

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4 7

8

2,3,3 4-4

<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">certain</span>' is the definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >This is the entire clue.<br/ ></span>

(Other definitions for surefire that I've seen before include "Always effective" , "certain to succeed" .)

I've seen this clue in The Times, The Independent, The Sun and the Universal.
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