The most common and most likely answer to this crossword clue is the 6 letter word TRADER
I've seen this crossword clue in The Guardian
T
R
A
D
E
R
More clues leading to the result TRADER
- Finance worker rejected Communist culture?
- Dealer turned up paintings from the communist era?
- City worker rejected socialist realism, say
- Communist subject turned marketeer
- Merchant recalled wine with skill
- He sells revolting left-wing paintings
- Returned some battered articles to shop-keeper
- Perhaps socialist realism repelled Wall Street worker
- Indiaman summoning up colourful pictures?
- Merchant has traditional sovereign
Buddy explains!

The straight part
We know that "Merchant" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case merchant = trader.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 TRADER mean?
TRADER noun- One who earns a living by trading goods or securities.