Crossword Genius

Crack female on island without a doubt (7)

Ross

I believe the answer is:

fissure

'crack' is the definition.
(I know that crack can be written as fissure)

'female on island without a doubt' is the wordplay.
'female' becomes 'f' (abbreviation).
'on' is a charade indicator (letters next to each other) (in a down clue, letters appear on others).
'island' becomes 'is' (abbreviation).
'without a doubt' becomes 'sure' (I've seen this in another clue).
'f'+'is'+'sure'='FISSURE'

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

I've seen this clue in the Sydney Morning Herald.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.