Fed chair Powell (6)
I believe the answer is:
jerome
'fed chair powell' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for jerome that I've seen before include "writer" , "and 19 Across: American composer of songs" , "-- K --, English author" , "and 24 Across: US composer" , "Scholarly saint" .)