Cryptic crossword clue
Provides relief if a student leaves it out 10

The most common and most likely answer to this crossword clue is the 10 letter word ALLEVIATES

I've seen this crossword clue in Financial Times
A
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Buddy explains!

The straight part
We know that "Provides relief" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case provides relief = alleviates.
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 ALLEVIATES mean?

ALLEVIATES verb
  1. To make less severe, as a pain or difficulty.

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