Most of TED Talk's about computer pioneer (5)
I believe the answer is:
gates
'most of ted talk's about computer pioneer' is the definition.
I can't judge whether this definition defines the answer.
'most of ted talk's about' is the wordplay.
'most of' means to remove the last letter.
'talk' becomes 'gas' (gas can mean to chat).
'about' means one lot of letters goes inside another.
'ted' with its final letter removed is 'te'.
'te' going into 'gas' is 'GATES'.
Can you help me to learn more?
(Other definitions for gates that I've seen before include "Entrance (to Microsoft?)" , "Confines (student) to college; entrances" , "Rich American" , "Billionaire Bill - openers" , "Moveable barriers" .)