The most common and most likely answer to this crossword clue is the 6 letter word MAHOUT
M
A
H
O
U
T
More clues leading to the result MAHOUT
- Jumbo passenger, leg part turned, then dislocated
- Old woman wearing trendy uniform is one in charge of jumbo?
- Male dismissed after I see how big his charges are!
- Person navigating Jumbo miles in error about a height
- Jumbo driver?
- One who controls the image of Republicans
- Man controlling jumbo?
- Animal handler’s cry, circus finally goes for master
- Handler's cry to replace mother with son
- Elephant keeper, married, with a husband no longer in the game
Buddy explains!

The straight part
We know that "how big his charges are!" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case how big his charges are! = mahout.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 MAHOUT mean?
MAHOUT noun- An elephant driver and keeper.
- To drive elephants.