The most common and most likely answer to this crossword clue is the 10 letter word SHOPKEEPER
I've seen this crossword clue in The Guardian
S
H
O
P
K
E
E
P
E
R
More clues leading to the result SHOPKEEPER
- Counter-agent: Napoleon's man in England?
- Butcher could be adulterating pork with European sheep
- Irish operator is such a person in trade
- Rat who often catches you out would be Arkwright, e.g.
- He sells grass to a cricketer.
- Person in business spoke here, troubled about parking
- See perk tossed after gathering climber cultivated as a brewing aid for a tradesman
- Merchant Seaman, say, pursuing quiet work
Buddy explains!

The straight part
We know that "Butcher could be" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case butcher could be = shopkeeper.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 SHOPKEEPER mean?
SHOPKEEPER noun- A trader who sells goods in a shop, or by retail, in distinction from one who sells by wholesale, or sells door to door.