Crossword Genius

Means of rescue – crease on the palm (8)

Ross

I believe the answer is:

lifeline

(Other definitions for lifeline that I've seen before include "Essential support (read by palmists?)" , "in the palm of one's hand" , "Vital safeguard" , "rescue operation?" , "vital means of communication" .)

I've seen this clue in The Guardian.
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