Move fast — fly, for example (3)
I believe the answer is:
zip
This clue might be a double definition.
'move' is the first definition.
(zipping is a kind of moving)
'fly for example' is the second definition.
'zip' can be an answer for 'fly' (both can mean to move quickly). I am not sure about the 'for example' bit.
'fast' is the link.
Can you help me to learn more?
(Other definitions for zip that I've seen before include "Type of fastener" , "Energy or clothes fastener" , "Toothed fastener" , "Locking device with two toothed edges and a sliding tab" , "Nothing < close up" .)