The most common and most likely answer to this crossword clue is the 7 letter word ICTUSES
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The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does ICTUSES mean?
ICTUSES noun- 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.