The most common and most likely answer to this crossword clue is the 6 letter word LADDIE
I've seen this crossword clue in The Guardian
L
A
D
D
I
E
More clues leading to the result LADDIE
- Guy at St Andrews? Liberal guy at St Andrews, not Conservative
- Tot in story is 4
- . Where some go mainly to introduce daughter and dashing chap
- Boy getting left – tot, that is
- Story about a big-chested northern boy
- Scots youth I’d lead out
- Young male tot having rest outside
- Son gets tot up, interrupting rest
- Boy’s story enthralling tot
- Tot emerges into porky young man
Buddy explains!

The straight part
We know that "4" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case 4 = laddie.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 LADDIE mean?
LADDIE noun- A small boy.