The most common and most likely answer to this crossword clue is the 8 letter word LACRIMAL
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The straight part
We know that "of tears" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case of tears = lacrimal.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 LACRIMAL mean?
LACRIMAL noun- A lachrymal or lachrymatory (vase intended for collecting tears).
- The lacrimal bone.
- Of or relating to tears or the tear-secreting organs.