The most common and most likely answer to this crossword clue is the 6 letter word GATHER
I've seen this crossword clue in The Guardian
G
A
T
H
E
R
More clues leading to the result GATHER
- Some shouting at Herod's rally
- Some yoga — the recruits assemble
- . Find out girl’s name before coming back
- Understand good parent avoids force
- Assume that woman has a gun
- Learn that woman has returned ticket in advance
- Understand heart broken by guy, originally
- Assemble to conclude harvest
- Understand mass
- Conclude contract
Buddy explains!

The straight part
We know that "Assemble/to conclude/harvest" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case assemble/to conclude/harvest = gather.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 GATHER mean?
GATHER noun- A plait or fold in cloth, made by drawing a thread through it; a pucker.
- The inclination forward of the axle journals to keep the wheels from working outward.
- The soffit or under surface of the masonry required in gathering. See gather (transitive verb).
- A blob of molten glass collected on the end of a blowpipe.
- A gathering.
- To collect; normally separate things.
- To bring parts of a whole closer.
- To infer or conclude; to know from a different source.
- (of a boil or sore) To be filled with pus
- To collect molten glass on the end of a tool.
- To gain; to win.