The most common and most likely answer to this crossword clue is the 7 letter word EARNING
I've seen this crossword clue in Financial Times
E
A
R
N
I
N
G
More clues leading to the result EARNING
- Bringing in the end of teaching when the head is away?
- Taking home Anne, girl endlessly distressed
- ... making grannie uneasy
- . . . . to lose the lead when winning
- Getting in range, perhaps
- Gainfully employed in education? Not entirely
- National Insurance to fall within revised range on salary
- Working grannie's making money
- Advice to abandon west and get east on return
- Desire to leave head on the payroll
Buddy explains!

The straight part
We know that "on salary" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case on salary = earning.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 EARNING mean?
EARNING verb- To gain (success, reward, recognition) through applied effort or work.
- To receive payment for work.
- To receive payment for work.
- To cause (someone) to receive payment or reward.
- To achieve by being worthy of.
- To curdle, as milk.
- To long; to yearn.
- To grieve.