The most common and most likely answer to this crossword clue is the 5 letter word WEEKS
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More clues leading to the result WEEKS
Buddy explains!

The straight part
We know that "several days" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case several days = weeks.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 WEEKS mean?
WEEKS noun- Any period of seven consecutive days.
- A period of seven days beginning with Sunday or Monday.
- A period of five days beginning with Monday.
- A subdivision of the month into longer periods of work days punctuated by shorter weekend periods of days for markets, rest, or religious observation such as a sabbath.
- Seven days after (sometimes before) a specified date.