The most common and most likely answer to this crossword clue is the 7 letter word MAGNATE
M
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N
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More clues leading to the result MAGNATE
- Fat cat finding small insect amid Mother Earth
- Noble fellow pockets silver coin finally
- Powerful businessman, a great knight, entertained by partner
- Publication chewed over Northern industrialist
- Tycoon having a grand name in China
- Businessman's money connected with father
- Person of importance has attraction for the audience
- A bug caught by me and Wall Street VIP
- Big shotinterrupted by a pest
Buddy explains!

The straight part
We know that "Big shot" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case big shot = magnate.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 MAGNATE mean?
MAGNATE noun- Powerful industrialist; captain of industry.
- A person of rank, influence or distinction in any sphere.