The most common and most likely answer to this crossword clue is the 6 letter word RENAME
I've seen this crossword clue in The Daily Telegraph
R
E
N
A
M
E
More clues leading to the result RENAME
- Change designation of item, an error partly reversed
- Getting mobile, men are to call another way
- Provide another handle that’s broken near setter
- Repair men are to attach a new handle
- Men are set to put a new handle on
- Give new title to some nobleman, erroneously sent back
- ‘Ring me’, missing the start — call again
- Move near Hippogryph to get new identity
- Having executed deed poll meander about
- Men are summoned to change handle
Buddy explains!

The straight part
We know that "call again" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case call again = rename.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 RENAME mean?
RENAME noun- An instance of renaming.
- To give a new name to.