Donkey initially with underground home (6)
I believe the answer is:
burrow
'underground home' is the definition.
The definition and answer can be both to do with motion as well as being verbs in their base form.
Maybe you can see a link between them that I can't see?
'donkey initially with' is the wordplay.
'donkey' becomes 'burro' (term for a small donkey).
'initially' says to take the initial letters.
The first letter of 'with' is 'w'.
'burro'+'w'='BURROW'
Can you help me to learn more?
(Other definitions for burrow that I've seen before include "Tunnel dug by rabbit" , "Dig tunnels" , "Warren" , "Tunnel; animal shelter" , "Hole dug by a small animal" .)