The most common and most likely answer to this crossword clue is the 8 letter word STUMPERS
S
T
U
M
P
E
R
S
Buddy explains!
The straight part
We know that "more than one tough inquiry" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case more than one tough inquiry = stumpers.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 STUMPERS mean?
STUMPERS noun- One who stumps, or speaks, or orates, as a politician.
- A difficult puzzle or problem.
- A boastful person.