The most common and most likely answer to this crossword clue is the 4 letter word WUSS
W
U
S
S
Buddy explains!
The straight part
We know that "what’s he called" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case what’s he called = wuss.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 WUSS mean?
WUSS noun- A weak, ineffectual, cowardly, or timid person.