Word: ictus
The pulse.
A sudden attack, blow, stroke, or seizure, as in a sunstroke, the sting of an insect, pulsation of an artery, etc.
The stress of voice laid upon an accented syllable of a word. Compare arsis.
In conducting, the indication of a musical event, most often the beat of the tempo or the entry of a section of the orchestra.
You can find a list of possible crossword clues for ICTUS below.