The most common and most likely answer to this crossword clue is the 15 letter word APPRENTICESHIPS
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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 APPRENTICESHIPS mean?
APPRENTICESHIPS noun- The condition of, or the time served by, an apprentice.
- The system by which a person learning a craft or trade is instructed by a master for a set time under set conditions.