Crossword Genius

Warn of the left extremity (7)

Ross

I believe the answer is:

portend

'warn' is the definition.
(thesaurus)

'left extremity' is the wordplay.
'left' becomes 'port' (left side of a ship - opposite of starboard).
'extremity' becomes 'end' (end is a kind of extremity).
'port'+'end'='PORTEND'

'of the' is the link.

(Other definitions for portend that I've seen before include "Signal" , "Foreshadow" , "Be a sign of (impending calamity)" , "Presage, bode" , "Give warning" .)

I've seen this clue in the Sydney Morning Herald.
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