Crossword Genius

With key one's certain to get an opening (7)


I believe the answer is:


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Here is my best explanation:

'an opening' is the definition.
(fissure is a kind of opening)

'with key one's certain' is the wordplay.
'with' says to put letters next to each other.
'key' becomes 'f' (I've seen this in other clues**).
'one's' becomes 'is' (roman numeral).
'certain' becomes 'sure' ('sure' can be a synonym of 'certain').
'f' next to 'is' is 'fis'.

'to get' acts as a link.


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This clue was last seen in The Telegraph

(Other definitions for fissure that I've seen before include "Long, narrow opening", "Crack in rock", "Split, crack", "Cleft", "Long, narrow crack", "Split - cleavage", "Crevice" and "Deep crack in rock".)

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