The most common and most likely answer to this crossword clue is the 7 letter word RETAILS
I've seen this crossword clue in The Daily Telegraph
R
E
T
A
I
L
S
More clues leading to the result RETAILS
Buddy explains!
The straight part
We know that "Sells" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case sells = retails.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 RETAILS mean?
RETAILS verb- To sell at retail, or in small quantities directly to customers.
- To sell secondhand, or in broken parts.
- To repeat or circulate (news or rumours) to others.