*Assist on "Who Wants To Be a Millionaire?" (8)

I believe the answer is:

lifeline

(Other definitions for lifeline that I've seen before include "vital means of communication" , "Essential support (read by palmists?)" , "Vital safeguard" , "Rope to haul person out of water - vital link" , "Vital support?" .)

I've seen this clue in the Universal.

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