The most common and most likely answer to this crossword clue is the 7 letter word COLLATE
I've seen this crossword clue in The Daily Telegraph
C
O
L
L
A
T
E
More clues leading to the result COLLATE
- Merge short section of text that’s overrunning?
- Officer slow to check everything’s in order
- Departed under army officer’s order
- Gather and put away
- Arrange 70 per cent of security
- Gather after expected time having come to mountain pass
- Army officer had to get rookie to study evidence
- Gather pass that’s overdue
Buddy explains!

The straight part
We know that "Gather" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case gather = collate.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 COLLATE mean?
COLLATE verb- To examine diverse documents and so on, to discover similarities and differences.
- To assemble something in a logical sequence.
- To sort multiple copies of printed documents into sequences of individual page order, one sequence for each copy, especially before binding.
- To bestow or confer.
- To admit a cleric to a benefice; to present and institute in a benefice, when the person presenting is both the patron and the ordinary; followed by to.