The most common and most likely answer to this crossword clue is the 4 letter word SING
S
I
N
G
More clues leading to the result SING
- Carol is smart, wasting little time
- Almost blacken pipe
- Lied about trendy lass in community music event?
- Squeal as insect’s tail is removed from bite
- Carol produces the wrong note
- Produce notes to inform
- Divulge information twice in prison
- Something evil and good in grass
- Dramatist
- Time to leave pop star to warble
Buddy explains!

The straight part
We know that "Vocalize" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case vocalize = sing.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 SING mean?
SING noun- A gathering at which people sing songs.
- To produce musical or harmonious sounds with one’s voice.
- To express audibly by means of a harmonious vocalization.
- To soothe with singing.
- To confess under interrogation.
- To make a small, shrill sound.
- To relate in verse; to celebrate in poetry.
- To display fine qualities; to stand out as excellent.
- To be capable of being sung; to produce a certain effect by being sung.