The most common and most likely answer to this crossword clue is the 4 letter word JOBS
I've seen this crossword clue in The Times
J
O
B
S
Buddy explains!

The straight part
We know that "Positions/big name at Apple" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case positions/big name at apple = jobs.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 JOBS mean?
JOBS noun- A task.
- An economic role for which a person is paid.
- (in noun compounds) Plastic surgery.
- A task, or series of tasks, carried out in batch mode (especially on a mainframe computer).
- A sudden thrust or stab; a jab.
- A public transaction done for private profit; something performed ostensibly as a part of official duty, but really for private gain; a corrupt official business.
- Any affair or event which affects one, whether fortunately or unfortunately.
- A thing (often used in a vague way to refer to something whose name one cannot recall).
- To do odd jobs or occasional work for hire.
- To work as a jobber.
- To take the loss.
- To buy and sell for profit, as securities; to speculate in.
- (often with out) To subcontract a project or delivery in small portions to a number of contractors.
- To seek private gain under pretence of public service; to turn public matters to private advantage.
- To strike or stab with a pointed instrument.
- To thrust in, as a pointed instrument.
- To hire or let in periods of service.