The most common and most likely answer to this crossword clue is the 8 letter word COLLECTS
I've seen this crossword clue in Financial Times
C
O
L
L
E
C
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S
More clues leading to the result COLLECTS
Buddy explains!

The straight part
We know that "Gathers" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case gathers = collects.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 COLLECTS mean?
COLLECTS verb- To gather together; amass.
- To get; particularly, get from someone.
- To accumulate (a number of similar or related objects), particularly for a hobby or recreation.
- To form a conclusion; to deduce, infer. (Compare gather, get.)
- (often with on or against) To collect payments.
- To come together in a group or mass.
- To infer; to conclude.
- (of a vehicle or driver) To collide with or crash into (another vehicle or obstacle).
- The prayer said before the reading of the epistle lesson, especially one found in a prayerbook, as with the Book of Common Prayer.