The most common and most likely answer to this crossword clue is the 11 letter word ABSENTEEISM
I've seen this crossword clue in The Daily Telegraph
A
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Buddy explains!

The straight part
We know that "skiving off work" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case skiving off work = absenteeism.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 ABSENTEEISM mean?
ABSENTEEISM noun- The state of being absent, especially frequently or without good reason; the practice of an absentee.
- The practice of absenting oneself from the country or district where one's estate is situated.