Bill from Microsoft — for supplying Access? (5)
I believe the answer is:
gates
'bill' is the definition.
(Bill Gates)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for gates that I've seen before include "Openings" , "Stage is set for them to open and close" , "Hinged barriers serving as entrances" , "philanthropist" , "Moveable barriers" .)