Musician, old, is introduced to computer program (6)
I believe the answer is:
oboist
'musician' is the definition.
(I know that oboist is a type of musician)
'old is introduced to computer program' is the wordplay.
'old' becomes 'o' (abbreviation).
'introduced to' is an insertion indicator.
'computer program' becomes 'bot'.
'is' going inside 'bot' is 'boist'.
'o'+'boist'='OBOIST'
(Other definitions for oboist that I've seen before include "Do I boost the musician?" , "Player of woodwind instrument of treble pitch" , "Wind player" , "Musician who plays woodwind of treble pitch" , "Instrumentalist" .)