Elevated attention about one’s extra money (5)
I believe the answer is:
raise
'extra money' is the definition.
(increase in pay)
'elevated attention about one's' is the wordplay.
'elevated' says the letters should be written in reverse (in a down clue, letters go up).
'attention' becomes 'ear' (having someone's ear is having their attention).
'about' indicates putting letters inside.
'one's' becomes 'I's' (Roman numeral).
'ear' backwards is 'rae'.
'rae' enclosing 'is' is 'RAISE'.
(Other definitions for raise that I've seen before include "Pick up" , "Wage increase" , "Lift up, bring up" , "climb" , "Lift, elevate" .)