The most common and most likely answer to this crossword clue is the 6 letter word PAGING
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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 PAGING mean?
PAGING verb- To mark or number the pages of, as a book or manuscript.
- (often with “through”) To turn several pages of a publication.
- To furnish with folios.
- To attend (someone) as a page.
- To call or summon (someone).
- To contact (someone) by means of a pager or other mobile device.
- To call (somebody) using a public address system so as to find them.
- The arrangement of pages in a book or other publication.
- A transfer of pages between main memory and an auxiliary store, such as hard disk drive.