Ray's upset at Sarah getting the money (6)
I believe the answer is:
salary
'the money' is the definition.
'ray's upset at sarah' is the wordplay.
'upset' indicates anagramming the letters.
'at' is a charade indicator (letters next to each other) (I've seen this in other clues).
'sarah' becomes 'Sal' (Sally is a common pet form of Sarah).
'ray' anagrammed gives 'ary'.
'ary' after 'sal' is 'SALARY'.
'getting' acts as a link.
(Other definitions for salary that I've seen before include "Remuneration for work done" , "Stipend" , "Regular remuneration" , "Worker's pay" , "Fixed regular payment of work" .)