The most common and most likely answer to this crossword clue is the 5 letter word BUYER
I've seen this crossword clue in The Daily Telegraph
B
U
Y
E
R
More clues leading to the result BUYER
- Purchaser’s place to keep stock of audition
- One who accepts Boris unquestioningly at first: “One’s uncouth”
- One purchasing extra round university close to Manchester
- He foots the bill for cow barn, one hears
- See you bagging uniform that’s right for shopper?
- Queen succeeds by keeping posh and one's stocking up
- Purchaser obtains ruby stone touring east
Buddy explains!

The straight part
We know that "one's stocking up" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case one's stocking up = buyer.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 BUYER mean?
BUYER noun- A person who makes one or more purchases.
- (retailing) A person who purchases items for resale in a retail establishment.
- A person who purchases items consumed or used as components in the manufacture of products.