Crossword Genius

A source of cash keeps personnel excited (7)

Ross

I believe the answer is:

athrill

I'm a little stuck... Click here to teach me more about this clue!

'excited' is the definition.
Both the definition and answer are adjectives.
Maybe you can see a link between them that I don't see?

'a source of cash keeps personnel' is the wordplay.
'source of cash' becomes 'till' (I can't justify this - if you can you should believe this answer much more).
'keeps' means one lot of letters goes inside another (inserted letters are kept inside).
'personnel' becomes 'HR' (Human Resources).
'till' placed around 'hr' is 'thrill'.
'a'+'thrill'='ATHRILL'

Can you help me to learn more?

I've seen this clue in The Independent.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.