The most common and most likely answer to this crossword clue is the 9 plus 6 letter word TELEPHONE NUMBER
I've seen this crossword clue in The Daily Telegraph
T
E
L
E
P
H
O
N
E
N
U
M
B
E
R
More clues leading to the result TELEPHONE NUMBER
- A personal detail another used to get you to pick up?
- Very large figure that may be kept in cell
- Contact info for person, booked earlier, now put in cell?
- Ring on digit? One could be engaged
- One usually starts with nothing — but this represents high earnings!
- Call song – I might need it to get through to you?
Buddy explains!
The straight part
We know that "this represents high earnings" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case this represents high earnings = telephone number.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.