The most common and most likely answer to this crossword clue is the 3 letter word DUB
I've seen this crossword clue in Financial Times
D
U
B
Buddy explains!
The straight part
We know that "Call" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case call = dub.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 DUB mean?
DUB verb- To confer knighthood; the conclusion of the ceremony was marked by a tap on the shoulder with a sword.
- To name, to entitle, to call.
- To deem.
- To clothe or invest; to ornament; to adorn.
- (heading) To strike, rub, or dress smooth; to dab.
- To prepare (a gamecock) for fighting, by trimming the hackles and cutting off the comb and wattles.
- A blow, thrust, or poke.
- To make a noise by brisk drumbeats.
- To do something badly.
- In golf, to execute a shot poorly.
- An unskillful, awkward person.
- A mostly instrumental remix with all or part of the vocals removed.
- A style of reggae music involving mixing of different audio tracks.
- A trend in music starting in 2009, in which bass distortion is synced off timing to electronic dance music.
- A piece of graffiti in metallic colour with a thick black outline.
- The replacement of a voice part in a movie or cartoon, particularly with a translation; an instance of dubbing.
- To add sound to film or change audio on film.
- To make a copy from an original or master audio tape.
- To replace the original soundtrack of a film with a synchronized translation
- To mix audio tracks to produce a new sound; to remix.
- A pool or puddle.
- A twenty dollar sack of marijuana.
- A wheel rim measuring 20 inches or more.
- A lock.
- A key, especially a master key; a lockpick.
- To open or close.