I'm going to lift different bits, evidently (7)
I believe the answer is:
cheerio
'i'm going' is the definition.
(word said when leaving)
'lift different bits evidently' is the wordplay.
I cannot quite see how this works, but
'lift' could be 'cheer' (lift can mean to cheer up) and 'cheer' is present in the answer.
'bits' could be 'io' (resembling 1 and 0, both bits in computing) and 'io' is found in the answer.
This accounts for all the letters.
This explanation may well be incorrect...
'to' is the link.
Can you help me to learn more?
(Other definitions for cheerio that I've seen before include "Bye" , "A hearty farewell, begins with applause" , "Informal farewell" , "Final message" , "Expression used when leaving" .)